Water Powered Torch
At 54 bucks, you can get a torch from Japan Trend Shop which can be powered by urine, haha as well beer, sake, coke ~ water. The torch is actually powered by AA NoPoPo hydrogen-powered batteries (included). Then you will need to use included syringe to suck water into the NoPoPo battery. Measures 3.75-inch x 1.08-inch.