This cooking system is unique in its ultra-efficient design, which combines a 1-liter FluxRing cup, wind-protected burner, and heat exchanger into a single rugged unit about the size of a Nalgene bottle. The FluxRing heat exchanger captures 80% of the flame's heat, about twice that of most canister stoves. One 3.5 ounce (110 gram) canister of fuel can boil up to 12 liters of water, which means less fuel to carry. It's also fast, taking two minutes to boil 16 oz. of water for cocoa, coffee, instant soup or a freeze-dried meal. Easy push-button starter. Compatible with any standard threaded fuel canister. Burner and a 3.5 oz. fuel canister nest inside the pot. Made in the USA of imported materials.