This water powered alarm clock
is lucky it has the 'environmentally-friendly' thing going for it because it sure doesn't have much in the way of looks. But even though it isn't pretty it is interesting, with its water "battery pack" sticking visibly on the side and powering the clock for several months at a time.
Need more juice? Simply add more water right from the tap. Features include the time, an alarm, a countdown timer, the temperature, and a gravity sensor that lets you switch from function to function just by changing the clock's position.
Plus the whole thing is recyclable and you'll never have to buy batteries again.
[via Shiny Shiny