A "Buddy Burner" is a simple fire in a tin can of some sort usually fueled by wax that has been added to corrugated cardboard
These simple emergency stoves can be used to cook on but could also provide a limited heat source, here it is heating some chicken noodles in my Latinaric Stainless Canteen Set
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All you require is an empty tin, in this case I'm using an altoids tin, this is smaller than many I've seen other people make but it fits nicely in your trouser pocket and as it has a lid makes snuffing out the flame safe and easy whilst keeping things clean and tidy when not in use 👍
I mark the cardboard and cut into strips that are the height of my tin, in the case 2cms wide, then I melt some candle wax and pour over the top
The safest way to do this is to place the wax into a container that is gradually warmed up in a pot full of water, so long as you don't boil the water the wax won't be heated to the point that it can begin burning
You can watch how I made mine here;
The amount of heat your burner will give off and how long it lasts will depend on the size of tin you use but this little pocket campfire easily boils water and heats food
I just pushed four wire tent pegs into the ground to act as a pot stand and you're good to go but of course you can find other means of supporting your pot depending on what your using
Take care
Roo