The water powered can clock also comes in four different colors so you can choose which one you like the most. Due to exploration, you will likely only need to refill the can once every 6 to 12 months. That is pretty low maintenance.
Product Description:
Water powered, no battery required.
Simply add water to the cell to activate, and enjoy free energy to run your clock.
Display the time and date.
Great for your using or a gift.