Step 7: Making the Penny Stove
The best design discovered is made with 8 thumbtack holes instead of needles. (Though larger needles can be used.)
The Penny Stove I will show you how to make is, in summary, nothing more than the bottom of two cans with holes in one that's stuffed inside the other. Nothing more. No "wicking" inside such as fiberglass, cotton, lint, etc.
IMPORTANT NOTE: Make absolute sure that your cans are thoroughly cleaned before you start work on them. If there is any soda residue in the bottom of the cans, it will be evaporated by the alcohol and clog the vent holes. You will have to start all over.
Note that while there are many stove designs that tell you to first sand the paint off of the stoves, I very specifically do not want you to do this. At least not for the "top" of the stove. The paint will act as a "glue" the first time the stove is lit adding strength and stability.