Waterpebble for a quick shower
With the Waterpebble you use less water when taking a shower. By placing the pebble near the drain, it measures the waterconsumption. A green, yellow and red light show when you should stop showering. Each time the pebble is used , the time span between green and red light will be shorter resulting in shorter showers thus less water is consumed.
Bron: Springwise
Website: Waterpebble