A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
-Robert A. Heinlein
Energy > Heat > ClayPotHeater > MultiFuelHeater

Multi Fuel Heater

This is a candidate for a DIY can heater or flowerpot heater. He says it can use ethanol as fuel, which is just hard alcohol (vodka, whiskey etc).

**Check out how long a typical stove might burn with the fuel suggested.

I believe in his first video on carbon felt, he mentioned you can get it from shoe inserts for smell. Need to ensure there is no plastic in carbon. (or can you burn it off?). If you don't have it you can use old t-shirts, hemp rope, bandages.

For fuels it can use methanol, which is a waste byproduct of our
distillation process from alcohol production or ethanol (drinking alcohol) so we can make it ourselves in the long term.

This could be terrifyingly dangerous if someone were to kick over the can however. Make sure you have the fire extinguisher we go in level 0 close by. Fuels like this can burn very cleanly, so you might not even know the ground is on fire at first.

Check out the DIY stove stand we built.