CrunchIt is a clever little tool that threads onto an empty butane gas canister to dissipate any remaining fuel and then, with an easy lever action, punctures the canister in several places. Once punctured and empty, it is easy to identify as safe to recycle in most local metal recycling programs. (You may want to check with your local recycler to ensure it will be recycled.)

The elegance is in the simplicity. The CrunchIt is designed for use on standard EN417 butane fuel canisters, meaning that Jetboil solved the problem for the whole industry. Check this video from Jetboil to see it in action.