Yeah, I just finished the Camping merit badge in Scouts and my merit badge counselor was showing us the different types of camping stoves, and one stove he had was a a tin can stove, or "hobo stove" as he called it. It was so cool that as soon as camp was ovr I made one myself, and I remember the guy saying to use perlite,(a type of pebble found in your local hardware store, costs a couple of bucks a bag) and but that in the can with denatured alcohol. Light it with a match and voila! you have a flame. It burns for about an hour before you need to put more alcohol in it. The can should last 7 or 8 times lit before you need to make a new one.