Penny Stove

I've been checking out alcohol stoves for camping and have come across several "classic" home-made designs, including the Pepsi, Cat Food and Turbo V8. These are all made of the respective cans, cut, foil taped and poked as necessary. However, this seems to be the most elegant and requires no tape: The Penny. The instructions are extremely simple (haven't made it yet, though) and uses only one thing: A Heineken keg can. Amazing!