Hoping to see if anyone has any idea on what this might be. I found it recently in a fireplace at a scout camp, Material is aluminium and the three parts screw together. The open end has a lip but no thread so looks like something can be put on it but I did not find any other parts. The piece with the mesh and the piece with the holes and fins are booth about 2cm high, the bottom/top is 1cm. Diameter is about 6cm.
Hubby thought it might have been an alcohol stove?