Chemex Funnex

The Chemex Funnex is Chemex’s single-cup dripper. Instead of brewing into its own glass carafe like a 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
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.

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 if you make several cups at once and want a carafe to pour from.
• Look at a V60 for another single-cup pour-over with thinner filters and a finer grind.

Funnex vs other brewers

• Chemex Classic: the full-size Chemex, brewing several cups into its own body.
• V60: a popular single-cup pour-over with thinner filters and a finer grind.
• Kalita Wave: a flat-bottomed single-cup dripper.
• AeroPress Go: another one-cup brewer that travels well.

Explore every pour-over in the pour-over chapter.