JETBOIL says:

The Flash Java Kit bundles our efficient Flash cooking system with the stowable Silicone Coffee Press, which stores perfectly inside the cook pot.

Boil in seconds so you can fuel up faster. Blistering boil times come standard in our industry-leading Flash. This means enjoying that hot cup of coffee or a hot meal at camp just got that much easier.

Included: Silicone Coffee Press lets you enjoy your favourite French press coffee wherever you’re headed