This is the ‘Penny’ or ‘Coke Can’ stove. Its an ultra lightweight, one person stove that fit in a pocket or side pouch and can boil enough water for a brew in just about 5 minutes. It burns methelated spirit (pictured) and works best with a windshield/priming pan (also pictured). Essentially, it just a lightweight version of the burner unit of a Trangia.
I made myself one of these for a recent expedition and it performed brilliantly, perfect for a quick cuppa beside the trail when you dont want to unpack half your gear to get the stove out.
Pretty soon I’m going to upload a quick guide to making yourself one of these.