Hexi Stove Solid Fuel Camping Cooker with Large Fuel Tablets

[Highlander]

They are,..or were the basic army stove for all of my career, and they work very well indeed, the fuel will burn in any weather.

The blocks can also be broken up if you have a need for smaller blocks,... the only slight down point is that they smell, now I love that smell, it will always remind me of rest/food,.. but the smell can travel.