I intend to experiment with several different cans, to see which by composition or height/width vaporizes and burns the best for the cookware I have.
Tuna is definitely one of the cans I have set aside, along with a steel mushroom can, and of course different hole configurations and a sturdier/wider can as a wind shield for the cat cans.

But the utter simplicity of the cat can (3 oz) is remarkable.