This little stove is amazing!! Unlike your boy or girl scout version, you can boil water with a few small sticks, and the stove weighs almost nothing. The super-efficient “rocket stove” was designed in the ’80s by a mechanical engineer for the alternative energy education outreach program, Aprovecho. This rocket stove link is a delight.
You can buy an inexpensive version for $35 if you dare, and even better is their free pdf booklet on how to make this stove and things like a bread oven from a 55-gallon drum.