I've used a a titanium folding stove, which is very small and very light. It works well for boiling water for soup, coffee, and freeze dried meals. It takes about five to seven minutes to heat 16 ounces of water to boiling. On the downside, it's not real stable, so you have to be careful when moving your cooking pot. You also have to keeping adding twigs to maintain the flame (which means removing the pot). Finally, your cooking pot gets covered in soot and residue which will stain anything it comes in contact with, so you need to keep it in a separate bag when in a pannier. I decided to switch to a Jet Boil, which is efficient, clean, and has a self-starting device.