Fuel Canister Rust Guard

Like many others I store my fuel canister inside my cooking pot while backpacking. I've found that on longer trips moisture gets trapped in the pot and eventually causes the metal ring on the bottom of the canister to rust. This ruined my first pot and yesterday I noticed another ring is starting to form on the replacement. So I sat down and designed a 3D model to snap onto the ring to protect the pot. This was designed to fit a 230g/8oz 109mm Sterno IsoButane canister, but should fit other canisters of the same size.

Attached are three models. They are mostly the same, except that the 1mm variants have a 1mm tall base while the 3mm variant has a 3mm tall base. While printing these, I found that the 1mm base prints excellent with TPU, but is fragile with harder filaments like PETG. So I recommend using TPU if possible. After all, we're all always searching for a reason to use that old spool we have laying around, right? Otherwise, print the model with the 3mm base.

With my TPU filam