# Chemex Funnex

Source: https://dailyextraction.com/methods/chemex-funnex/
Last updated: 2026-10-16

> The Chemex Funnex is a single-cup pour-over dripper from Chemex. It's made of double-walled borosilicate glass and sits straight on a mug, travel cup or flask on its silicone gasket, brewing 5 to 15 oz at a time through Chemex's half-moon FP-2 filters. It brings the Chemex's clean cup to one mug, with no carafe.

## At a glance

- Ratio: 1:17
- Grind: Medium-coarse
- Category: Pour-over & Drip (Percolation)
- Difficulty: Beginner
- Origin: United States
- Also known as: Funnex, single-cup Chemex, Chemex Funnex dripper, Chemex one-cup

## Steps

1. **Fit the gasket**: Put the silicone gasket on the Funnex and sit it on your mug, travel cup or flask. Chemex says to use the gasket whenever the Funnex sits on a vessel, so air can flow.
2. **Fit a filter**: Fold a Chemex FP-2 half-moon filter into a cone, put it in the Funnex and rinse it with hot water. Empty the rinse water from your mug.
3. **Add the coffee**: Add coffee ground medium-coarse, about 1 g for every 17 g of water you plan to pour.
4. **Bloom**: Pour about twice the coffee's weight in hot water to wet all the grounds and wait 30 seconds.
5. **Pour in stages**: Pour in slow circles, a little at a time, until you reach your total. Don't overfill your mug.
6. **Lift and drink**: Lift the Funnex off once it has drained, and drink.

The **Chemex Funnex** is Chemex's **single-cup dripper**. Instead of brewing into its own glass carafe like a [Chemex](https://dailyextraction.com/methods/chemex/), it **sits straight on your mug, travel cup or flask** on a silicone gasket, and brews **5 to 15 oz** at a time through Chemex's thick bonded filters. It's made of **double-walled borosilicate glass**. Here's how to use it and how it compares with a full-size Chemex.

## The short version

- **A one-cup Chemex dripper** that sits on your mug, travel cup or flask.
- **Double-walled borosilicate glass**, with a silicone gasket.
- **Brews 5 to 15 oz.**
- **Uses Chemex FP-2 half-moon filters** (or FP-2N, natural).
- **Grind medium-coarse**, as for any Chemex.



## How is it different from a Chemex?

| | Funnex | [Chemex Classic](https://dailyextraction.com/methods/chemex/) |
| --- | --- | --- |
| Makes | One cup, 5 to 15 oz | Several cups, 3 to 10-cup sizes |
| Brews into | Your mug, travel cup or flask | Its own glass body |
| Glass | Double-walled borosilicate | Borosilicate |
| Filters | FP-2 half-moon | Squares or circles, by size |
| Sits on | A silicone gasket | Its own base |

## What is the gasket for?

The **silicone gasket** sits between the Funnex and your cup. Chemex says to **use it whenever the Funnex sits on a vessel**, so air can flow properly while it brews.

## What filters does it use?

Chemex's bonded **FP-2** half-moon filters, or **FP-2N**, the natural (unbleached) version. They're usually sold separately, so buy a pack with your Funnex.

## How much coffee should I use?

Chemex doesn't publish a gram recipe for the Funnex. A good starting point is the same **1:17** ratio as Counter Culture Coffee's Chemex recipe, about **1 g of coffee for every 17 g of water**, ground **medium-coarse**. Make it a little stronger if you like.

![Chart of coffee grind sizes from extra fine to extra coarse, with medium-coarse highlighted for the Chemex Funnex](https://dailyextraction.com/diagrams/grind-size.svg#medium-coarse "Use a medium-coarse grind in the Funnex, as for any Chemex.")

## How do you use the Funnex, step by step?

1. **Fit the gasket** and sit the Funnex on your mug, travel cup or flask.
2. **Fold an FP-2 filter**, put it in and rinse it with hot water. Empty the rinse water from your cup.
3. **Add your coffee**, ground medium-coarse.
4. **Bloom:** pour about twice the coffee's weight in hot water and wait 30 seconds.
5. **Pour in stages**, a little at a time, until you reach your total. Keep an eye on your cup so it doesn't overflow.
6. **Lift the Funnex off** once it has drained.

## How do you clean it?

Throw away the filter and grounds, then rinse or wash the glass and gasket.

*General guidance only. It's glass, so handle it carefully when hot and follow the instructions that come with yours.*

## Should I buy the Funnex?

- **Buy the Funnex** if you mostly make one cup, often straight into a travel cup or flask. Chemex also sells it in a Traveler set with a thermos.
- **Buy a [Chemex](https://dailyextraction.com/methods/chemex/)** if you make several cups at once and want a carafe to pour from.
- **Look at a [V60](https://dailyextraction.com/methods/v60/)** for another single-cup pour-over with thinner filters and a finer grind.

## Funnex vs other brewers

- **[Chemex Classic](https://dailyextraction.com/methods/chemex/):** the full-size Chemex, brewing several cups into its own body.
- **[V60](https://dailyextraction.com/methods/v60/):** a popular single-cup pour-over with thinner filters and a finer grind.
- **[Kalita Wave](https://dailyextraction.com/methods/kalita-wave/):** a flat-bottomed single-cup dripper.
- **[AeroPress Go](https://dailyextraction.com/methods/aeropress-go/):** another one-cup brewer that travels well.

Explore every pour-over in the [pour-over chapter](https://dailyextraction.com/methods/pour-over/).

## Words used in this guide

- [Gasket](https://dailyextraction.com/glossary/gasket/): A gasket is the rubber or silicone ring that seals two parts of a coffee maker together, such as the top and bottom halves of a moka pot or the group head of an espresso machine.
- [Body](https://dailyextraction.com/glossary/body/): Body is how heavy and textured coffee feels in your mouth, from light and tea-like to thick and syrupy.
- [Bloom](https://dailyextraction.com/glossary/bloom/): The bloom is the first small pour of water in a brew, usually 2–3 times the weight of the coffee, followed by a 30–45 second pause.
- [Pour-over](https://dailyextraction.com/glossary/pour-over/): Pour-over is a way of making filter coffee by hand: you pour hot water over ground coffee in a filter cone and let it drip through into a cup or jug.

## FAQs

### What is the Chemex Funnex?

A single-cup pour-over dripper from Chemex. It sits directly on a mug, travel cup or flask, so you get Chemex-style coffee one cup at a time, without a carafe.

### What filters does the Chemex Funnex use?

Chemex bonded FP-2 half-moon filters, or FP-2N, the natural (unbleached) version. Filters are usually sold separately.

### How much coffee does the Chemex Funnex make?

Chemex lists its capacity as 5 to 15 oz, so it suits one mug or a small flask.

### What is the Funnex gasket for?

The silicone gasket sits between the Funnex and your cup. Chemex says to use it whenever the Funnex sits on a vessel, so air can flow properly while it brews.

### What is the Funnex made of?

Double-walled borosilicate glass, with a silicone gasket. It's about 4.5 inches tall and 4.25 inches across.

### Funnex or Chemex, which should I buy?

The Funnex if you mostly make one cup, often straight into a travel cup or flask. A Chemex if you make several cups at once and want a carafe to pour from.

## Sources

- [FUNNEX pour-over coffeemaker](https://chemexcoffeemaker.com/products/funnex)
- [CHEMEX Traveler pour-over set with FUNNEX and thermos](https://chemexcoffeemaker.com/products/the-traveler)
- [Getting started](https://chemexcoffeemaker.com/pages/getting-started)
- [Quick + easy Chemex](https://counterculturecoffee.com/pages/quick-easy-chemex)
- [CHEMEX Funnex 1-cup glass coffeemaker](https://jewelcoffee.com/products/chemex-funnex-1-cup-glass-coffeemaker)