In a similar vein to the can stove above is the
garlington wood gasification stove It's a "batch-loaded, inverted down-draft gassifier" that is also DIY and tin can based. It's a handy little stove i use in the backcountry, I use shavings from wax/sawdust cubes molded in
cardboard eggcartons as a starter.
These can stoves can really lighten your pack and in appropriate environments can be much lower impact (and way less expensive!) than backpacking stoves. Watch you don't burn the world down accidentally.
The kelly kettle is heavy, but i like the stainless version for beach camping with small open sailboats.