What an ingenious little gadget! Just set the button and place waterpebble next to the plughole, take a shower, and waterpebble remembers how much water you used. When you take your next shower, traffic lights go from Green – start, Amber - half way through, to Red – stop, indicating you have used as much water as you did last time. Excellent for teenagers who seem to spend hours in the shower. A clever design, simple. inexpensive and of course, recyclable. www.waterpebble.com.
