Move your fuel between canisters with a device that weighs less than a penny. The Alpenflow was dreamt up along the Pacific Crest Trail in 2023, after seeing piles of semi-filled rusting fuel canisters in hiker boxes. You can borrow fuel from hiker boxes, split canisters amongst friends, or consolidate your pile of half-filled canisters.

Specs:

Weight: 2.4g (0.09oz)
Works with all threaded isobutane canisters (built per EN 417)
100% Made in USA
A refrigerator or direct sunlight also needed to drive transfer

How to Use:

Warm Your Donor Canister and/or Cool Your Recipient Canister
- This transfer requires a pressure difference to push the upper liquid fuel down into the lower canister
- The donor canister can be warmed in the sun, never use an oven or flame
- The larger the difference, the faster the transfer will run
Place Warm Canister on TOP, Cool Canister on BOTTOM (no threading needed)
Press Down Hard for 5 - 10 seconds
Repeat as Needed, especially if filling a near-empty lower canister.
- Once the warm donor fuel mixes & heats the lower liquid fuel sufficiently, the transfer will slow and eventually stop.

Warnings & Safety:

To mitigate the risk of liquid butane expanding when canister is heated, never fill beyond the original fill level (~80%)
Fuel canisters do not meet D.O.T. requirements for commercial transportation after refilling (a.k.a. it’s illegal for businesses to transport refilled canisters)
Never use a flame or oven to heat canisters
Never fill canisters with pure propane, and only transfer “winter mix” fuel (70% butane / 30% propane) into canisters rated for winter mix fuel.

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