The FlipFuel Fuel Transfer Device lets you consolidate leftover isobutane fuel from partially used canisters into one full canister. Made from precision-engineered aluminum alloy with brass fittings, it weighs just 1.4 oz (39.7g) and measures 2.13 x 1 x 1.25 inches. Compatible with threaded isobutane canisters from MSR, Jetboil, Snow Peak, and more. Create a temperature differential between canisters and FlipFuel transfers fuel using natural pressure difference.