And, for the cans, it then cures in place. The BPA is like a catalyst and doesn't bind with the material, which is what allows it to leach out so well. Polyeth

And, for the cans, it then cures in place. The BPA is like a catalyst and doesn't bind with the material, which is what allows it to leach out so well. Polyethylene, in addition to being a safer molecule, uses catalysts which don't end up in the final product, which means you can't be exposed to them.