Pretty ingenious. Two alcohol stoves made from soda cans. About four minutes.

Here are directions on how to make them. About 10 1/2 minutes. And here\'s another variation , about five minutes. I'm going to give this a try.

Onward and upward,
airforce

That is one use for them. VC Charlie used to start one with sun lite.
Built the same way except the holes were on the bottom and it was filed with gasoline. Wet a piece of paper or rag with gasoline and place over the fill slots. Position a piece of broken glass so the angle magnifies the sun at the point where the wet paper was. Position over a large hole lines with paper and fill with more gasoline and some rounds.
Perfect for removing small trees and lean-tos.

cat food can with holes punched in it and some denatured alcohol is a great little stove