I have made a folding heater for a mess tin using polished stainless metal 1mm thick with laser cutting. The height of a mess tin can be adjusted with the help of two props. It can be fully inserted in the heater that also has the door.
Wood stove for a mess tin. Weight 1.154 kg with the case. Height 170 mm, length 170 mm, width 100 mm.
Here is a fully assembled:
Blueprints (drawing) Wood Stove