I'm running on 4 hours of sleep so this will be a quick post. Somewhere in our archives I posted about alcohol stoves for cars. They are a small coffeecan just big enough to slip in a roll of TP sans cardboard, alcohol and the retained lid for storage. The TP acts as wick to slowly burn the alcohol. If the TP singes brown you need more fluid. Thses things are dirt cheap and significantly raise the temp in a small space.