This is still what I am thinking about, and i might alter it a bit, or even a lot...
but...
The green would be fireproof insulation
The sides and bottom of the water pot would have fins to increase surface area
The bottom of the fire pot would contain a mesh to keep the fire from burning whatever the pot is standing on
The water pot would fit inside the fire pot, and the insulated sleeve would pull up the sides of the fire pot and be held up by the skewers the waterpot stands on.
I think....
But as I said, its sort of niggling at me.
Im going to play with it a bit more and see how I feel.
Right now, I feel its too slow and uses too much fuel and is far heavier than I think I would like to carry.
Lazy. Thats me.