yeah they can be used for banger, still confusing that they can't hold water though. maybe they could act as refillable water containers Funnily enough, I had been assuming that they were for holding water & just couldn't figure out how to fill them. I've never been interested in making bangers w/in the game because I generally try to save my charcoal for the dark suit or for filtering water. Thanks for the replies though.
Well, my question's in the title... I can't find a use for them, as of yet, other than to fill my inventory. Incidentally, playing this game makes me realize exactly how much of a hoarder I am, given my unwillingness to get rid of anything I happen to find...