I don't have any pictures right now. But here is the Wikipedia article that got me started:
Hobo stove - Wikipedia, the free encyclopedia
Back in the late 90s, my dad built some alcohol stoves using soda cans.
Beverage-can stove - Wikipedia, the free encyclopedia
One problem with building these things is that we end up with a lot of scrap metal. I hope the guys at the recycling plant don't mind.