There are plenty of aluminum can stove designs out there. This one is different in that it is not made from aluminum cans but rather from aluminum bottles (aluminum beer bottles to be specific)
These stoves are easily made and work very well, in an emergency situation you could make one of these stoves and cook or boil water so its safe to drink. I really like the design of this one and what more unique is that its not make from a can.
Photo: hpstoutharrow / instructables