This isn't "my idea", I found it on the next several years ago. It's an Environmental Fireplace made from a 1 gal metal thinner can. Real simple and works too. The metal sides support a small grate and the sides reflect the heat upwards. It's good on canoe trips, too heavy for backpacking. I have wanted to make one from a quart can someday.

cut open

Set up for cooking. (Wire ties sides and back together).

Packed flat for travel
