Place receiving canister in the freezer, ice chest, or a cool shaded area. Place sending canister in the sun.
Wait 5 to 10 minutes. This allows the fuel canisters to create a temperature differential that facilitates the transfer.
Thread canisters onto FlipFuel® device. Sending canister on top ("OUT") side, receiving canister on bottom ("IN") side. Hand tighten.
Open valve to transfer fuel. Once fuel transfer is complete, close valve and detach isobutane fuel canisters.