Coleman made it first, a safe metal puncturing device to vent out and properly dispose of their spent Powermax aluminum fuel canisters for recycling.

Recently Jetboil has their own version to puncture Steel canisters, REI sells them.

Key is attach canister to stove, open value all the way, light it (IF it will) and let it run down for a 5 minutes, BEFORE you puncture the canister.

I'd like to see all fuel canisters made of Aluminum instead of steel.