The Fire Maple Woodpecker Spork is a versatile piece of cutlery, not only does it function at both a spoon and fork, it also acts as a gas canister punch.
Fire Maple says:
Three-in-one titanium cutlery combines spoon, fork and gas canister punch.
Fire Maple's Woodpecker Titanium Spork is a versatile piece of cutlery, not only does it function at both a spoon and fork, it also acts as a gas canister punch.
Basically you can't put 'empty' fuel canisters in for recycling because there may be residual gas in them - when you think it's empty you can punch them with the puncture tool and they can happily be recycled.