A buddy of mine (by the way I have never seen this) has an old milk can partially full of water sitting on the wood stove. He takes water out of it when he requires it and can adjust the water temp by adding cool water, etc. For a shower he has it rigged up so all he has to do is screw in a metal tube (adjustable) with a shower type of end. He sits it on a shelf between 2 trees. BL