At first glance this clock looks no different from any other, but upon closer inspection you’ll notice there isn’t a battery slot. That’s because its water (or any other electrolytic fluid like beer) powered. The clock comes to life – displaying the time and date – after the liquid reservoirs located in the back are filled. An internal converter extracts electrons from any liquid and acts as a power generating fuel cell for the clock. It measures 6″ x 4″ x 2 1/2″ and is available now from ThinkGeek.com for just $12.99.
“We’ve had ours running for weeks so far and the water levels have barely descended and we haven’t had to refill it at all.”