Check out this ultra light alcohol stove. It weighs only 1 oz and has no moving parts. You can make it yourself in just a few minutes and it will outlast most conventional stoves. Boils in under 5 minutes and the fuel is cheap. This is a perfect stove for ultra light backpacking!
Use a 20 oz bottle cap and a vitamin water cap to make two lines on your can. Use a 1/4" hole punch to make 15-17 holes about a 1/2" apart along the bottom line on the can. Once you have the bottom done, punch another 25-28 holes along the top line of the can, approx. 1/4" apart.