# Manual Coffee & Tea Prep

Three tool families share this shelf: coffee brewers, hand grinders and espresso hand tools, each with its own deciding fact. For brewers it is the brew method and the filter it uses; for grinders, whether it truly grinds for espresso; for espresso tools, the machine's basket size.

## How it works

Coffee brewing pulls soluble flavour out of ground coffee with hot water, and a manual brewer decides how water meets the grounds and what separates them afterwards. In pour-over (percolation) water runs through a bed of grounds in a usually paper-lined cone or flat-bottom dripper. In full immersion, the French press, grounds steep in the water and a metal mesh plunger holds them back. Steep-and-release drippers steep like a press, then drain through paper. AeroPress-style presses steep, then push the coffee through a paper disc by hand. The filter sets the cup: paper gives clarity and traps the oily compounds that raise cholesterol, while metal mesh passes oils and fine silt for more body. A hand grinder sets the grind size every method depends on, and espresso needs a fine, precisely set grind. [19] [11] [10] [8] [15]

| Family | What it is | Suits |
|---|---|---|
| Pour-over (percolation) | Water is poured through grounds in a paper-lined dripper and drains straight out. | Buyers who want a clean, bright cup and will pour by hand. |
| Full immersion | Grounds steep in all the water, and a metal mesh plunger holds them back. | Buyers who want a full-bodied pot with little technique. |
| Steep-and-release | A dripper with a valve: grounds steep, then the coffee drains through paper. | Buyers who want immersion ease with a paper-clean cup. |
| Pressure plunger (AeroPress-style) | Grounds steep in a tube, then a hand plunger pushes the coffee through a paper disc. | Single cups, travel and quick cleanup. |
| Hand burr grinder | Two cutting burrs, turned by a crank, crush beans to a set size. | Fresh grinding without a motor; espresso only on the finer-stepped models. |

## How an expert narrows the choice

```mermaid
timeline
  section 1 · Tool type
    coffee brewer : ask Brew method, Capacity : skip Grind range, Step size per click, Basket size
    hand grinder : ask Grind range, Grinder capacity, Burr material : skip Brew method, Filter the coffee passes through, Basket size
    espresso tool : ask Espresso tool type, Basket size : skip Brew method, Grind range
  section 2 · Brew method
    pour-over : ask Dripper shape, Paper it takes, Filter the coffee passes through, Brewer material : skip Press filter
    full immersion : ask Press filter, Brewer material : skip Dripper shape
    steep-and-release : ask Paper it takes : skip Press filter
    pressure (AeroPress-style) : ask Brewer material : skip Dripper shape, Press filter
  section 3 · Grind range
    espresso-focused / all-purpose : ask Step size per click, Burr size
    pour-over and coarser : ask Grinder capacity : skip Step size per click
  section 4 · Basket size
    Which espresso machine is it for?
```

1. **Tool type.** Coffee brewer, hand grinder, or espresso tool?
   The leaf bundles three tool families whose facets do not overlap, so the answer sets aside the two families that do not apply and decides which of the other splits matter. Answers map one to one onto the facet's values.
   If coffee brewer: ask Brew method, Capacity; skip Grind range, Step size per click, Basket size.
   If hand grinder: ask Grind range, Grinder capacity, Burr material; skip Brew method, Filter the coffee passes through, Basket size.
   If espresso tool: ask Espresso tool type, Basket size; skip Brew method, Grind range.
   Skip if already known: a query that names the tool: dripper, French press, AeroPress, grinder, tamper, an earlier answer naming the tool.

2. **Brew method.** Pour-over, French press, steep-then-drain (Clever, Switch), or AeroPress-style?
   The brew method is the mechanism and decides filter, technique and batch size. French press maps to full immersion, steep-then-drain to steep-and-release, AeroPress-style to pressure.
   If pour-over: ask Dripper shape, Paper it takes, Filter the coffee passes through, Brewer material; skip Press filter.
   If full immersion: ask Press filter, Brewer material; skip Dripper shape.
   If steep-and-release: ask Paper it takes; skip Press filter.
   If pressure (AeroPress-style): ask Brewer material; skip Dripper shape, Press filter.
   Skip if already known: a query naming a brewer model, such as V60, Chemex, Kalita, Clever, Switch, AeroPress or Bodum.

3. **Grind range.** Grinding for espresso, filter coffee, or both?
   Many hand-grinder titles claim espresso, but makers sort their own range into pour-over, all-purpose and espresso models. Espresso maps to espresso-focused or all-purpose by the maker's label, filter to pour-over and coarser, both to all-purpose.
   If espresso-focused or all-purpose: ask Step size per click, Burr size.
   If pour-over and coarser: ask Grinder capacity; skip Step size per click.
   Skip if already known: the user owns an espresso machine, an earlier answer naming the brew method.

4. **Basket size.** Which espresso machine is it for?
   A tamper or dosing tool that doesn't match the basket is useless, so this is a hard filter. Breville/Sage are 54 mm except the Oracle Jet and Dual Boiler (58 mm); De'Longhi 51; Lelit 57; Gaggia and commercial 58.
   Skip if already known: the user's espresso machine model from memory or an earlier answer, a query that states a diameter, such as 58 mm.

## What to surface

### Tool type

Which of the three tool families the product belongs to: coffee brewer, hand grinder or espresso tool. The leaf mixes tools that share no specs. A burr material means nothing on a French press, and a basket diameter means nothing on a hand grinder, so every other facet in this register applies to one family only. [29] [30]

Values: coffee brewer, hand grinder, espresso tool.
Question to ask: Coffee brewer, hand grinder, or espresso tool?

Used as: top-level split, filter. Data: on the listing, backfill cost none. Look for it as: The product noun in the title (dripper, French press, grinder, tamper), and Amazon's 'Coffee Maker Type' field on brewers.

### Brew method

For coffee brewers, how water meets the grounds: poured through (pour-over), steeped (full immersion), steeped then drained (steep-and-release), or steeped then pressed (pressure). The brew method is the mechanism and the first split inside brewers. Pour-over rewards a steady pour and gives the cleanest cup; a French press needs no technique and gives body and some silt; steep-and-release drippers steep like a press but drain through paper; AeroPress-style presses make one cup fast. Grind size follows the method, coarse for a press and finer for pour-over. [19] [11] [15] [29]

Values: pour-over, full immersion, steep-and-release, pressure (AeroPress-style).
Question to ask: Pour-over, French press, steep-then-drain (Clever, Switch), or AeroPress-style?

Used as: top-level split, filter. Data: on the listing, backfill cost low. Look for it as: In the title ('Pour-Over', 'French Press', 'Immersion Dripper') and Amazon's 'Coffee Maker Type' field (French Press, Pour Over, Drip).
Steep-and-release models (Hario Switch, Clever) are sometimes typed as pour-over; the word 'immersion' or a valve in the description settles it.
Chart: Clarity versus effort map.

### Basket size

For espresso tools, the inside diameter of the espresso machine's filter basket that a tamper, distribution tool or dosing funnel must fit. Tools do not cross sizes, and too small a tamper leaves an untamped ring and hurts the shot, which is why Wirecutter tells Gaggia owners to replace the stock one. Home machines use 51, 54, 57 or 58 mm; Breville/Sage are 54 mm except the Oracle Jet and Dual Boiler, which use 58 mm. 58 mm tampers are sold from 58.35 to 58.5 mm, so match the nominal basket size. [26] [27] [28] [14] [30] [25]

Question to ask: Which espresso machine is it for?

Used as: top-level split, filter. Data: on the listing, backfill cost low. Look for it as: In the title as a millimetre figure ('58mm Espresso Tamper', 'Normcore 58.5mm'); brands also sell by machine.
Map the tool's diameter to its nominal basket: 58.0 to 58.5 is 58 mm. Map the user's machine with a lookup like Normcore's shop-by-machine list, but check named exceptions first: Breville's Oracle Jet (BES985) and Dual Boiler (BES920) are 58 mm, not the 54 mm of the rest of the home range.
Chart: Machine-to-basket chart.

### Grind range

For hand grinders, which brew methods the grinder is built to grind for, using the makers' own labels: pour-over and coarser, all-purpose, or espresso-focused. This is the first thing to know about a hand grinder. Espresso needs a fine grind set inside a narrow band, so makers sell espresso-focused models with finer steps, but also sell all-purpose models fine enough for occasional espresso; the maker's own label, not the title, says which. Titles help little, since many claim espresso even on models the maker steps for filter. [22] [25] [30] [12] [23]

Values: pour-over and coarser, all-purpose, espresso-focused.
Question to ask: Grinding for espresso, filter coffee, or both?

Used as: top-level split, filter. Data: needs research, backfill cost medium. Look for it as: The maker's category label (1Zpresso tags a hand grinder 'Espresso', 'All-purpose' or 'Pour Over'; Timemore names its finer-stepped hand grinder 'C5 ESP PRO'). Marketplace titles often list every method and should not be used.
Take the maker's label; if a model carries both an espresso and an all-purpose tag, keep both. Where no label exists, derive it from grind_step_um and say so. Backfill the top-selling grinders per brand; leave the long tail derived or unknown.
Chart: Grind-size scale.

### Filter the coffee passes through

For coffee brewers, what separates grounds from coffee: paper, cloth or metal mesh. Paper traps the oils and fine particles, so the cup is clean and bright; metal mesh lets them through, so the cup is fuller with some silt. The oils carry cafestol, which raises LDL cholesterol: a six-month trial found cafetière coffee raised it against filtered coffee, and a 2025 Swedish study measured several times less cafestol in paper-filtered brews. Cloth cuts it sharply too. [7] [8] [10] [19] [29]

Values: paper, cloth, metal mesh.
Question to ask: Clean and bright, or full-bodied with some silt?

Used as: shown on the card, filter. Data: on the listing, backfill cost low. Look for it as: Amazon 'Filter Type' field (Paper, Metal, Reusable). 'Reusable' is ambiguous and was wrong on the Kalita Wave, which takes paper.
Map 'Reusable' to metal mesh only when the description names a mesh or steel filter; otherwise read the brewer's instructions.
Chart: Clarity versus effort map.

### Capacity

For coffee brewers, how much water a brewer holds, normalised to millilitres. Capacity decides how many people one brew serves and how many grams of beans it needs, but listing figures do not compare. A coffee-gear 'cup' is 4 or 5 ounces, not a mug, Bodum counts the beaker while Espro counts brewed coffee, and Amazon's capacity field mixes cups, ounces, millilitres and pounds. Normalise to millilitres before comparing. [11] [18] [29]

Question to ask: One mug at a time, or coffee for two to four?

Used as: shown on the card, filter, sortable. Data: on the listing, backfill cost medium. Look for it as: Amazon 'Capacity' field and the title (12 oz, 34 oz, 6-Cup, Size 02). Units vary: 0.35 liters, 750 ml, 4 cups, 1.9 pounds.
Convert cups with the maker's own cup size where known (Bodum 34 oz for 8 cups; Chemex 30 oz for 6). Treat a capacity in pounds as an extraction error and read the title. The basis still differs by brand (Bodum's figure is the beaker, Espro's is brewed coffee), so a straight conversion compares beaker to beaker only; flag cross-brand comparisons as approximate.
Chart: length of a bar in millilitres, with a 250 ml mug marked.

### Espresso tool type

For espresso tools, which accessory it is: tamper, distribution tool, dosing funnel or replacement basket. Basket size filters every one of these, but the four tools do nothing alike: a buyer who only knows 'espresso tool' cannot be asked a useful follow-up until the kind of tool is known. [30] [28]

Values: tamper, distribution tool, dosing funnel, basket.
Question to ask: Tamper, distribution tool, dosing funnel, or basket?

Used as: filter. Data: on the listing, backfill cost none. Look for it as: The tool noun in the title ('Espresso Tamper', 'Distribution Tool', 'Dosing Funnel', 'Replacement Basket').

### Brewer material

For coffee brewers, what the body is made of: a specific plastic, borosilicate glass, ceramic, single-wall steel or double-wall steel. Material decides heat, breakage and what touches hot coffee. Ceramic, glass and steel drippers pull heat from the first pour unless rinsed with hot water, and plastic does not. Glass presses are borosilicate but break when knocked or when the frame fails, which has led to burn and laceration recalls; double-wall steel keeps coffee hot over an hour. AeroPress's plastic has moved from polycarbonate, the BPA plastic, to polypropylene; no other brand's switch is documented here. [15] [11] [1] [21] [20] [17]

Values: polypropylene, copolyester (Tritan), polycarbonate, plastic (unspecified), borosilicate glass, ceramic, single-wall steel, double-wall steel.
Question to ask: Glass to watch it brew, unbreakable steel, or light plastic?

Used as: shown on the card, filter. Data: on the listing, backfill cost low. Look for it as: Amazon 'Material' field (Glass, Ceramic, Stainless) and the title ('Borosilicate', 'Double Wall'). The specific plastic type is usually only on the brand page; Amazon's plain 'Plastic' maps to 'plastic (unspecified)'.
Double-wall is in the title on most steel presses. Record polypropylene, copolyester or polycarbonate only where the brand states it (AeroPress's own history page is the one documented case); otherwise use 'plastic (unspecified)' rather than guessing.

### Dripper shape

For pour-over drippers, whether the bed of grounds sits in a cone with one large hole or on a flat bottom with small holes. Shape changes the cup and how forgiving the dripper is. Flat-bottom drippers like the Kalita Wave drain more slowly through three small holes, so uneven pours matter less and the cup is fuller. Cones like the V60 drain fast through one large hole, reward a controlled pour and suit light roasts. A UC Davis panel found the two shapes taste different, with the gap depending on roast. [15] [16] [13] [9]

Values: cone, flat-bottom.
Question to ask: Forgiving flat-bottom, or a cone that rewards practice?

Used as: shown on the card, filter. Data: on the listing, backfill cost low. Look for it as: In the title ('Conical Shape', 'Wave', 'flat bottom') and visible in the product photo.
The photo answers it; leave to the image pipeline when the title is silent. Count the product photo as the listing field here, since it is present on every listing the title isn't.

### Grinder capacity

For hand grinders, how many grams of beans one fill grinds. Hand grinders hold 18 to 40 g, which is one or two cups, so a full French press or Chemex needs more than one load. Pair it with the brewer: at 1:14 to 1:17 a 34 oz press needs about 59 to 72 g of beans. Espresso doses fit easily; big batch brewers do not. [12] [22] [24] [30]

Question to ask: One cup at a time, or a whole pot?

Used as: shown on the card, filter. Data: on the listing, backfill cost low. Look for it as: Brand pages ('Grounds Capacity: 35-40g'); Amazon 'Capacity' field on some listings. Check for conflicts: one Timemore C5 Pro listing's Product information row reads 25 g while another C5 Pro listing's title claims 30 g.
Brand pages carry it; Amazon's capacity field on grinders sometimes holds weight in ounces or pounds and should be checked, and listings for the same model can disagree, so cross-check against the brand page where the figure matters.
Chart: bar beside the brewer's bean requirement.

### Step size per click

For hand grinders, how far one click of the adjustment moves the burrs, in microns; stepless grinders have no clicks. Step size decides whether an espresso shot can be adjusted. Espresso sits in a narrow band, 7 clicks wide on a Comandante against 18 for pour-over; a wider band means step size rarely limits pour-over. Timemore halves the step on its espresso variant: the ESP Pro moves 15 microns per click against 31 on the C5 Pro. 1Zpresso's J-Ultra (espresso, 8 µm) and K-Ultra (all-purpose, 20 µm) are different grinders, not a halved pair. [22] [30] [23] [19] [25]


Used as: shown on the card, sortable. Data: needs research, backfill cost medium. Look for it as: Brand spec pages ('8-micron adjustment per click'); sometimes in the Amazon title ('0.031mm Precision Adjustment').
Brand pages carry it for grinders above entry level; entry-level Amazon grinders advertise click counts, not microns, and leave it unfilled. Backfill the top-selling grinders per brand and leave the rest null. Record stepless as null with a stepless flag.
Chart: Grind-size scale.

### Paper it takes

For paper-filter brewers, which paper filter shape and size the brewer needs, such as V60 cone 02, Kalita Wave 185, Chemex, Melitta-type #2 or #4, or AeroPress disc. Most pour-over drippers need their own paper, so the brewer locks in a running cost. Hario's cone papers will not sit flat in a Kalita Wave, and reviewers test each dripper with its own filter. A dripper that takes Melitta-type #2 or #4 papers is the cheapest to keep running, since those are sold everywhere. [15] [16] [29]

Values: V60-type cone, Kalita Wave, Chemex, #2 or #4 (Melitta-type), AeroPress disc, none (built-in metal filter).

Used as: shown on the card, filter. Data: needs research, backfill cost low. Look for it as: Sometimes in the title ('for #2 or #4 paper filter'); otherwise only the brand page or manual. Amazon's 'Filter Type' says Paper but not which.
Brand pages state it. Keep the field on cold-brew jars and other immersion brewers when the listing names a paper liner.

### Press filter

How well a French press plunger keeps grounds out: a single mesh screen, a mesh with a sealing ring, or a double micro-filter. The plunger, not the beaker, decides how muddy a press is. Wirecutter's first test is a mesh screen that fits snugly; loose plungers on the Stanley and Le Creuset presses left muddy cups. Espro's double micro-filter kept out nearly all grit and slowed extraction after plunging, but it cannot brew small batches, since its 32 oz press makes no less than 24 oz. [11] [19] [29]

Values: single mesh screen, mesh with sealing ring, double micro-filter.

Used as: shown on the card, sortable. Data: needs research, backfill cost medium. Look for it as: Title words such as 'Double Filter' or 'Micro-Filtered'; the seal is in bullets or photos.
Brand pages and reviews. Backfill the top 50 presses by sales; the rest default to single mesh screen. A cold-brew jar or other immersion brewer with no plunger has no press filter: mark not applicable rather than defaulting it to single mesh screen.

### Burr material

For hand grinders, what the cutting burrs are made of: stainless steel, coated steel, or ceramic. Wirecutter found a steel burr gave Timemore a noticeable edge over the lower-cost hand grinders that use ceramic, and judged a ceramic-burr Porlex not worth its price. Ceramic burrs are common on cheap grinders, so the material is a quick quality screen. Coated steel is sold for espresso by 1Zpresso. [12] [22] [30]

Values: stainless steel, coated steel, ceramic.

Used as: shown on the card, filter. Data: on the listing, backfill cost low. Look for it as: In the title or bullets ('Stainless Steel Conical Burr', 'S2C-042-III stainless steel burrs'); the exact burr code is often in the title but the material word sits in the bullets.
Brand page when the title and bullets are silent. 'Coated steel' (1Zpresso's coated burr) is brand-page only; it does not appear in Amazon titles.

### Burr size

For hand grinders, the diameter of the conical burr in millimetres. Bigger burrs grind faster, which matters most at fine settings where hand grinding is slowest. Wirecutter credits Timemore's move from 38 to 42 mm burrs with slightly faster grinding, and timed 20 g at about a minute on a medium setting but up to 3 minutes finer. 1Zpresso sells its 48 mm burr on speed. [12] [22] [30]


Used as: shown on the card, sortable. Data: needs research, backfill cost low. Look for it as: Brand spec pages ('48mm'); Timemore codes it in the burr name (S2C-042 is 42 mm) and in bullets.
Brand pages. Comandante does not publish it on its product page; leave null rather than guess.
Chart: position on a short horizontal scale in mm.

## Numbers worth computing

| Metric | Formula | Why |
|---|---|---|
| Beans for a full brew (g) | `brewer_capacity_ml / 17 to brewer_capacity_ml / 14` | Reviewers and enthusiasts brew between 1:14 and 1:17 coffee to water for pour-over, press and AeroPress-style brewers, so a brewer's size is really a bean requirement: about 59 to 71 g per litre. A 34 oz press needs about 59 to 72 g. [18] [11] |
| Grinder loads per brew (loads) | `ceil(beans_per_full_brew_g_min / grinder_capacity_g) to ceil(beans_per_full_brew_g_max / grinder_capacity_g)` | A hand grinder holds 18 to 40 g, so pairing it with a large press or Chemex can take 1 to 4 loads depending on grinder size, not always the single 'twice' a mid-sized grinder needs. [12] [22] [24] [18] |
| Mugs per brew (mugs) | `brewer_capacity_ml / 250` | Makers' 'cups' run 100 to 150 ml, so an 8-cup press holds about four mugs. Dividing by a 250 ml mug gives the count a buyer means. [11] [18] [29] |

## What you give up

- Paper gives the cleanest cup and traps cafestol but costs a filter per brew and strips the body some drinkers want. Metal mesh keeps body and needs no paper, but passes silt and the cholesterol-raising oils. [10] [7] [11] Board branch: "See more paper-clean brewers".
- A cone drains fast and brings out brightness in light roasts, but punishes an uneven pour. A flat bottom drains slowly and evenly, so it forgives a beginner's pour and gives a fuller cup. [15] [16] [13] Board branch: "See more forgiving drippers".
- Glass shows the brew and ceramic looks good, but both break and pull heat unless rinsed hot. Steel survives drops and double walls hold heat, but you cannot watch the brew. Plastic is light and keeps heat, and the plastic type matters. [15] [11] [1] Board branch: "See more unbreakable brewers".
- Fine steps let you adjust espresso, but moving from espresso to French press takes many more clicks, and fine grinding is the slowest by hand. Makers split their ranges into espresso and pour-over models for this reason. [22] [23] [12] Board branch: "See more grinders built for espresso".
- Espro's double micro-filter makes a near grit-free press, but its 32 oz model cannot brew less than 24 oz. A single-screen press brews any amount with more silt. [11] Board branch: "See more grit-free presses".

## How to draw it

**Grind-size scale** (scale, shows Grind range, Step size per click). Brew methods laid out from fine (espresso) to coarse (French press, cold brew) on one scale, with a grinder's clicks drawn as ticks. A buyer sees at once how many settings fall inside the narrow espresso band. Used today by Honest Coffee Guide's grind size chart; Comandante's FAQ gives the same ladder in clicks.. [19] [23]

**Machine-to-basket chart** (swatch grid, shows Basket size). One chip per basket size (51, 54, 57, 58 mm) with the machines under each. A buyer finds their machine and the right tool size without knowing the number. Used today by Normcore's 'Shop by machine' menu.. [26] [28] [27]

**Clarity versus effort map** (two axis map, shows Filter the coffee passes through, Brew method). Cup clarity (metal mesh to paper) against technique needed (press to cone pour-over). French presses sit low on both; cones sit high on both; flat-bottom and steep-and-release drippers sit at high clarity with less effort, which is the corner most beginners want. This is a proposal, nobody draws it this way yet. [15] [11] [19]

## Words you will meet

- **Pour-over**. Brewing by pouring hot water by hand through ground coffee sitting in a paper-lined dripper.
- **Immersion**. Brewing by leaving the grounds to steep in all the water, as in a French press.
- **Steep-and-release**. A dripper with a valve that holds the water in to steep, then lets it drain through paper.
- **Cafestol**. An oily compound in coffee that raises LDL cholesterol; paper filters trap it and metal mesh does not.
- **Borosilicate glass**. Glass made to survive sudden temperature changes, used for French press beakers, though it still breaks if knocked.
- **Double-wall**. Two layers of steel with a gap between, which keeps coffee hot and the outside cool.
- **Polycarbonate**. A hard, clear plastic made from BPA, used in early AeroPress models and some older plastic brewers.
- **Burr**. One of the two ridged cutting parts in a grinder that crush beans to a set size.
- **Micron**. One thousandth of a millimetre, the unit for grind size and for how far one click moves the burrs.
- **Stepless**. A grinder adjustment with no clicks, which can be set anywhere in its range.
- **Brew ratio**. Grams of coffee to grams of water, such as 1:16, which sets how strong the cup is.
- **Portafilter basket**. The metal cup on an espresso machine's handle that holds the ground coffee.
- **Tamper**. A flat-based tool that presses ground coffee level and firm in the portafilter basket.

## Where we made a call

- Listing cup counts and capacities do not compare across brands; normalise to millilitres first. (confidence high). Wirecutter puts a gear 'cup' at 4 or 5 ounces and notes Bodum and Espro measure differently; CoffeeGeek cites 100 to 140 ml cups; Amazon lists Chemex and Espro capacity in pounds. [11] [18] [29]
- Metal-mesh brews such as French press carry cholesterol-raising cafestol; paper filtering removes most of it. (confidence high). A randomised trial and a 2025 measurement study agree on direction. The effect matters for heavy daily drinkers; we do not cite a size because each figure comes from one study. [7] [8] [10]
- 'For espresso' in a hand-grinder title is not evidence; the maker's own range label and step size are. (confidence medium). Sources disagree. Our call. Timemore titles both its 31 and 15 micron burrs 'for Espresso'; 1Zpresso labels models espresso, all-purpose or pour-over. Wirecutter calls the 31 µm C5 Pro fine for 'occasional espresso' but not 'serious espresso-making', so sources disagree on whether a coarser step still counts. [30] [22] [25] [12]
- Plastic brewers fall under food-contact law, and regulators disagree on BPA, so record the plastic type. (confidence medium). Sources disagree. EU: adopted 19 Dec 2024, in force 20 Jan 2025; repeat-use BPA articles could be sold until 20 July 2026, now passed. Ban also covers silicones and rubber. FDA: BPA safe at current food levels. Only AeroPress confirms its plastic switch. [4] [5] [6] [3] [21]
- A glass French press is a burn and laceration hazard when dropped or when its frame fails; steel avoids it. (confidence high). CPSC recalled about 28,000 Bodum presses in 2014 after carafes fell out of frames, with burns reported. Wirecutter notes borosilicate cracks if knocked and recommends a protective frame and available replacement beakers. [1] [2] [11]
- An unheated plastic dripper keeps the brew warmer than ceramic or glass, but rinsing with hot water closes most of the gap. (confidence medium). ATK says ceramic, glass and steel pull heat unless prerinsed; a café's 18-brew test found plastic a few degrees warmer. No source measured preheated drippers, so the second half is ATK's advice. [15] [17]
- Match the tamper to the nominal basket size; the exact base size within 58.35 to 58.5 mm is disputed. (confidence medium). Sources disagree. Decent recommends 58.35 mm and warns against 58.5; Normcore sells 58.5 mm and Wirecutter recommends it. Both agree a tamper narrower than the basket hurts the shot. [27] [14] [30]

## References

1. [US CPSC: Bodum USA recalls coffee presses sold exclusively at Starbucks (2014), Internet Archive copy](http://web.archive.org/web/20260312144820/https://www.cpsc.gov/Recalls/2014/Bodum-USA-Recalls-Coffee-Presses-Sold-Exclusively-at-Starbucks) (regulator). Supports: Glass carafe can fall out of the frame and shatter: laceration and burn hazard; About 28,000 units; about 14 breakage reports, two burns, two lacerations.
2. [US CPSC: Starbucks recalls Bodum recycled coffee presses (2019), Internet Archive copy](http://web.archive.org/web/20260315173541/https://www.cpsc.gov/Recalls/2019/Starbucks-Recalls-Bodum-Recycled-Coffee-Presses-Due-to-Laceration-Hazard) (regulator). Supports: Plunger knob can break and expose the metal rod; about 230,000 units in the US.
3. [US FDA: Bisphenol A (BPA): Use in Food Contact Application](https://www.fda.gov/food/food-packaging-other-substances-come-contact-food-information-consumers/bisphenol-bpa-use-food-contact-application) (regulator). Supports: FDA holds BPA safe at current levels in food; Polycarbonate is the hard clear plastic made with BPA.
4. [European Commission: Food contact materials](https://food.ec.europa.eu/food-safety/chemical-safety/food-contact-materials_en) (regulator). Supports: Kitchenware and tableware are food contact materials under EU law; Framework Regulation (EC) No 1935/2004.
5. [UL Solutions: Bisphenol A in food contact materials, Regulation (EU) 2024/3190](https://www.ul.com/insights/bisphenol-food-contact-materials-regulation-eu-20243190) (other). Supports: EU adopted the BPA ban on 19 December 2024; in force 20 January 2025; Reusable articles made with BPA could be first placed on the market until 20 July 2026.
6. [Keller and Heckman (packaginglaw.com): EU bans BPA and other bisphenols in food-contact materials](https://www.packaginglaw.com/news/eu-bans-bpa-and-other-bisphenols-food-contact-materials) (other). Supports: Adopted 19 December 2024; BPA prohibited in food-contact plastics, coatings, silicones and rubber.
7. [Urgert et al., cafetière versus filtered coffee, six-month randomised trial, BMJ 1996 (PubMed 8956701)](https://pubmed.ncbi.nlm.nih.gov/8956701/) (academic). Supports: Cafetière coffee raised LDL cholesterol against filtered coffee; reversible after stopping.
8. [Orrje et al., cafestol and kahweol in machine coffee versus conventional brewing, NMCD 2025 (PubMed 40089392)](https://pubmed.ncbi.nlm.nih.gov/40089392/) (academic). Supports: Paper-filtered brews had several times less cafestol than French press; Fabric filtering cut boiled coffee's cafestol sharply.
9. [Frost, Ristenpart and Guinard, effect of basket geometry on drip brewed coffee, J Food Sci 2019 (PubMed 31269246)](https://pubmed.ncbi.nlm.nih.gov/31269246/) (academic). Supports: Cone and flat-bottom baskets brew coffees tasters tell apart; Geometry effects interact with roast.
10. [Wikipedia: Cafestol](https://en.wikipedia.org/wiki/Cafestol) (primer). Supports: Highest in unfiltered brews such as French press; paper filters retain it.
11. [Wirecutter: The Best French Press (updated April 2025), Internet Archive copy](http://web.archive.org/web/20260827141003/https://www.nytimes.com/wirecutter/reviews/best-french-press/) (specialist review). Supports: A coffee-gear cup is 4 or 5 ounces; Bodum counts beaker, Espro brewed coffee; Borosilicate beakers still crack if knocked; double-wall steel keeps coffee hot over an hour; Snug mesh plunger is the key test; loose plungers gave muddy cups; Espro 32 oz brews no less than 24 oz; test ratio 25 g to 350 ml.
12. [Wirecutter: The Best Coffee Grinder (updated January 2026), Internet Archive copy](http://web.archive.org/web/20260722055734/https://www.nytimes.com/wirecutter/reviews/the-best-coffee-grinder/) (specialist review). Supports: Manual grinders usually hold about 18 to 35 g; Steel burr has an edge over ceramic in lower-cost grinders; 42 mm burrs grind faster than 38 mm; 20 g in a minute at medium.
13. [Wirecutter: Kalita Wave review (updated November 2023), Internet Archive copy](http://web.archive.org/web/20251202142040/https://www.nytimes.com/wirecutter/reviews/kalita-wave-pour-over-dripper-review/) (specialist review). Supports: Flat bottom, wavy papers, three small holes: slower and fuller than the V60.
14. [Wirecutter: espresso machines for beginners, Internet Archive copy](http://web.archive.org/web/20260722055305/https://www.nytimes.com/wirecutter/reviews/best-espresso-machine-grinder-and-accessories-for-beginners/) (specialist review). Supports: A tamper narrower than the basket interferes with the shot; Recommends 58 mm and 58.5 mm replacement tampers for the Gaggia.
15. [America's Test Kitchen: The Best Pour-Over Coffee Makers (updated June 2025)](https://www.americastestkitchen.com/equipment_reviews/1408-pour-over-coffee-brewers) (specialist review). Supports: Flat-bottom easier for novices; cones suit light roasts; Ceramic, glass and steel pull heat unless prerinsed; plastic less so; Top cone and flat-bottom picks both need proprietary filters.
16. [Tom's Guide: Kalita Wave Dripper review](https://tomsguide.com/home/kalita-wave-dripper-review) (specialist review). Supports: Flat bottom and three holes are more forgiving than a V60; Hario cone papers will not fit the Kalita; Reviewer brews 1:16 on V60 and Chemex, 1:18 on Kalita.
17. [Andytown Coffee Roasters: glass, ceramic or plastic V60 drippers](https://andytownsf.com/blogs/news/glass-ceramic-or-plastic-how-do-different-v60-drippers-affect-coffee-flavor) (other). Supports: In 18 brews plastic ran warmest and ceramic coolest, by a few degrees.
18. [CoffeeGeek: One to Fourteen, the CoffeeGeek ratio](https://www.coffeegeek.com/blog/techniques/one-to-fourteen/) (enthusiast community). Supports: 1:14 starting ratio for non-pressurised brews; experts use 1:14 to 1:17; SCA median 1:18 for batch brewing; Maker cups ranged from 100 to 140 ml.
19. [Honest Coffee Guide: coffee grind size chart](https://honestcoffeeguide.com/coffee-grind-size-chart/) (primer). Supports: Espresso falls in a narrow, fine band; French press is coarsest; Steep-and-release: pour-over form, immersion, released through the filter; French press mesh cannot block fine particles.
20. [Wikipedia: AeroPress](https://en.wikipedia.org/wiki/AeroPress) (primer). Supports: Polycarbonate until 2009, then copolyester, polypropylene from 2014, Tritan in 2023.
21. [AeroPress UK: Evolution of the AeroPress](https://www.aeropress.co.uk/blogs/news/evolution-aeropress-history) (spec sheet). Supports: Polycarbonate is made from BPA; current parts are polypropylene except filter and seal.
22. [1Zpresso: J-Ultra, K-Ultra and category pages](https://1zpresso.coffee/espresso/) (spec sheet). Supports: Models labelled Espresso, All-purpose or Pour Over; J-Ultra 8 microns per click, 48 mm; K-Ultra 20 microns; Grounds capacity 35 to 40 g.
23. [Comandante: FAQ](https://comandantegrinder.com/pages/faq) (spec sheet). Supports: Espresso 7 to 13 clicks; pour-over 18 to 35; French press 25 to 35.
24. [Comandante: C40 MK4 Nitro Blade product page](https://comandantegrinder.com/products/c40-mk4-nitro-blade-black) (spec sheet). Supports: Bean jars hold 40 g of coffee.
25. [Timemore: brand site and Chestnut C5 series product page](https://www.timemore.com/collections/all-products/products/timemore-manual-coffee-grinder-chestnut-c5-series) (spec sheet). Supports: Espresso tool set sold at 58.4 mm (brand site menu); C5 Pro: 0.031 mm per click; C5 Esp Pro: 0.015 mm per click (product page, confirms the Amazon title); Hand grinders are named 'C5 PRO' and 'C5 ESP PRO'; 'Pour-over Only' labels only appear on electric Sculptor grinders.
26. [Normcore: shop by machine](https://normcorewares.com/) (spec sheet). Supports: 54 mm Breville/Sage; 58 mm E61, Gaggia, La Marzocco, some Breville; 51 mm De'Longhi; 57 mm Lelit.
27. [Decent Espresso: portafilter baskets](https://decentespresso.com/basket) (spec sheet). Supports: Recommends a 58.35 mm tamper for 58 mm baskets; smaller leaves an untamped ring; 58 mm fits most commercial machines.
28. [Breville: Barista Express (BES870), Infuser (BES840), Oracle Jet (BES985) and Dual Boiler (BES920)](https://www.breville.com/us/en/products/espresso/bes870.html) (spec sheet). Supports: 54 mm portafilter; Breville sells 54 mm distribution and dosing tools; Oracle Jet (BES985): 'Professional 58 mm stainless steel portafilter'; Dual Boiler (BES920): 'Professional 58 mm stainless steel portafilter'.
29. [Amazon product pages (ASINs B0047BIWSK, B00005LM0R, B011WTM622, B000P4D5HG, B004W5JHXU, B0000YWF5E, B07NS2SV3W, B07QK39RWT, B000J3JFJU): AeroPress, Bodum Chambord, Espro P3, Hario V60, Kalita Wave, Chemex, Hario Switch, Melitta, Finum](https://www.amazon.com/dp/B000P4D5HG) (retail listing). Supports: Material, Filter Type and Capacity fields present on brewers; Capacity in cups, ounces, millilitres and pounds; Kalita Filter Type wrongly 'Reusable'; Finum Shape field 'Basket'.
30. [Amazon product pages (ASINs B0FHHBG5JR, B0727VD99Y, B09BTLP4P1): Timemore C5 Pro and C5 ESP Pro, 1Zpresso J, LuxHaus and Normcore tampers](https://www.amazon.com/dp/B0FHHBG5JR) (retail listing). Supports: Timemore titles give 0.031 mm and 0.015 mm steps, both 'for Espresso'; Burr material in grinder titles; B0FHHBG5JR shows 'Capacity 25 g', a different C5 Pro listing says 30 g; Tamper titles carry the diameter: 58 mm, 58.5 mm.