The company Bedol from Claremont (California, USA) offers organic alarm clocks, the use of which there is no need to buy batteries. Just enough time to pour water from the tap.
Eco-friendly Bedol clocks need to supply only water, they do not need standard batteries to operate, and they are harmless to the environment. All that is required, the user is once in 8-12 weeks to open the valve and add fresh potable water.
Thanks to an integrated microchip, memory settings while refueling water will not be shot down.