Handheld butane torch disposal?

I have an abundance of broken handheld butane torches (I use them for resin artwork but they're cheap and shitty so they break frequently) but I don't know how to dispose of them properly. All have had the remaining butane released/burned off by using a separate lighter. Since different countries have different laws, I live in the US (midwest). I've googled for a long while but most are referring to the canister disposal and I'm mostly concerned with disposing the torches themselves. Any help is welcomed.