The Sgt Rock alcohol stove is a winner. Almost weightless, almost foolproof, nothing to wear out or clog. I built one and combined with the pot cozy cooks dinner with very little fuel.

Alcohol stoves are so simple, in a pinch you can cook simply by cutting a soda can down to about 1 inch tall, add a little alcohol and light. Good enough to boil water and with a little boiled water you can make instant rice, mashed potatoes, pasta if you have a cozy (or a lot of fuel), oatmeal, etc.