Consolidate your half empty fuel canisters with the FlipFuel® Fuel Transfer Device. 

This ultra-lightweight, durable gadget allows you to transfer isobutane fuel between canisters, allowing you to top-off before a trip, condense larger to smaller gas cans & avoid waste in the bottom of discarded bottles. The precision-engineered aluminium alloy with brass fittings and a net weight of just 1.4 ounces (39.7 grams)