Find the Right Canister
Tools: band saw, ruler
We found a film development tank with a lid among a pile of lab supplies in the UW-Madison SWAP shop. With its 1-mm thick wall, it’s sturdy all right! We just need to saw off the top. 4 cm from the bottom gives more room than we need to store the fuel for cooking. 2 cm would have done just fine and saved an extra ounce of weight — it wouldn’t have been safe to cut though.
4 cm tall: up to 1 cup of fuel
2 cm tall: up to 1/2 cup of fuel