Ceramic vs Glass vs Plastic Brewers
Does a dripper’s material change your coffee? Ceramic, glass, plastic and metal compared on heat, with conductivity figures and two side-by-side brewing tests.
Is a ceramic, glass or plastic dripper best?
For heat, plastic is slightly ahead: it conducts heat poorly and weighs little, so it takes the least warmth from the brew. In one 18-brew test, plastic V60 brews ran 2–4 °F warmer than ceramic; in another, the differences were negligible. Preheat ceramic and glass, and choose on looks, durability and price.
Does the material of your dripper matter? It’s one of the most argued-over questions in pour-over. Ceramic, glass, plastic and metal all brew coffee the same way; the difference is how much heat each one takes out of the water. This page looks at the physics and at two side-by-side brewing tests, and comes to a calm conclusion: preheat, then choose the one you like.
The short version
- Plastic takes the least heat from the brew: it’s a poor conductor and light.
- Ceramic and glass take more, unless you preheat them well.
- Metal heats and cools fastest.
- Measured differences are small: about 2–4 °F in one test, negligible in another.
- Choose on looks, durability and price, then preheat.
Why would material change the coffee?
Because brewing temperature affects extraction, and a cold dripper pulls heat out of the water. Three things decide how much, Green Plantation explains: conductivity (how fast heat moves into the dripper), heat capacity (how much heat it takes to warm it up, which depends on its weight) and surface heat loss to the air.
| Material | Thermal conductivity (W/m·K) | Notes |
|---|---|---|
| Polypropylene (plastic) | 0.1–0.22 | Light; a poor conductor |
| Acrylic and polycarbonate (plastics) | About 0.2 | |
| Glass | About 1.05 | |
| Porcelain | About 1.5 | Heavy: a ceramic 02 V60 weighs about 400 g |
| Stainless steel | About 17 | Gains and loses heat fast |
Sources: The Engineering ToolBox (conductivity); Green Plantation (V60 weight). Green Plantation quotes 4–5 W/m·K for porcelain, higher than the ToolBox’s 1.5; either way, porcelain conducts several times better than plastic.
What did the brewing tests find?
| Test | Method | Result |
|---|---|---|
| Andytown Coffee Roasters | 18 brews on plastic, glass and ceramic V60s, two coffees; temperature of the bed and the finished brew | Plastic warmest, ceramic coolest, glass about 2 °F below plastic and ceramic about 4 °F below |
| Eight Ounce Coffee | Thermocouple between the wet filter and the wall of plastic, ceramic, glass and metal V60s, readings every 10 seconds | Biggest differences in the bloom; glass slow to pick up heat, metal quickest to gain and lose it; over the whole brew, negligible difference |
Sources as listed.
Andytown’s taster still found the cups different: plastic the punchiest, with the clearest flavour notes; glass clear, crisp and sweet; ceramic rounded and sweet, with the notes blending together. The tester preferred the ceramic. That’s one person’s palate, but it’s a reminder that “warmer” isn’t automatically “better”.
How do you get the best from each material?
| Material | Strengths | What to do |
|---|---|---|
| Plastic | Cheap, light, hard to break; takes the least heat | Nothing special; rinse the paper as usual |
| Ceramic | Looks good; holds heat once warm | Preheat thoroughly with hot water |
| Glass | Looks good | Preheat; handle with care |
| Metal | Durable; good for travel | Preheat thoroughly |
Sources: Green Plantation; Andytown; Eight Ounce.
Is a plastic dripper safe?
Hario’s plastic V60s are BPA-free and rated for temperatures up to 130 °C, Green Plantation says: polypropylene for the coloured ones and styrene-acrylonitrile (AS) resin for the clear one. Hario’s newer Tritan V60 is BPA-free and, Hario says, less prone to cracking than ordinary resins.
Materials and other guides
- Hario V60 dripper: every V60 material and size.
- Paper vs cloth vs metal filters: the material that changes the cup most.
- Gooseneck kettle: for keeping your water at temperature.
Questions & answers
Does a plastic V60 make better coffee than ceramic?
Not clearly. Plastic takes the least heat from the brew, and in Andytown Coffee Roasters' test of 18 brews it ran 2–4 °F warmer than ceramic. But Eight Ounce Coffee's thermocouple test found negligible differences over a full brew, and Andytown's taster actually preferred the ceramic cups.
Does a ceramic dripper need preheating?
Yes. Porcelain conducts heat several times better than plastic and is much heavier, so a cold ceramic dripper soaks heat out of the first pours. Rinse it with plenty of hot water first, as Green Plantation advises.
Is a plastic coffee dripper safe?
Hario's plastic V60s are BPA-free and rated to 130 °C, Green Plantation says, and Hario's Tritan version is BPA-free too. Boiling water is 100 °C, within that rating.
Is a metal dripper good?
It's the toughest, and good for travel, but stainless steel conducts heat much faster than plastic, ceramic or glass. In Eight Ounce's test the metal V60 gained and lost heat quickest.
Sources
- HARIO V60 Material and Temperature Comparison. Eight Ounce Coffee
- Glass, Ceramic, or Plastic: How Do Different V60 Drippers Affect Coffee Flavor?. Andytown Coffee Roasters
- V60 in plastic, porcelain or steel. Which is the best?. Green Plantation
- Thermal Conductivity of Selected Materials and Gases. The Engineering ToolBox
- Hario V60 Coffee Dripper Tritan, Size 02 (Clear). Hario UK