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I've been making these for ages: https://tomsbiketrip.com/how-to-turn-a-beer-can-into-the-only-camping-stove-youll-ever-need-video/
They work incredibly well and are so tiny and light. My "best" one sits inside my cup in a plastic bag with a few camping matches.
You can make a functional meths/multi-fuel burner out of two old drinks cans. I still stand by trangias.