The patented Boa Waterpebble is a great little bathroom gadget, which retrains you to take shorter showers.
You simply place the Waterpebble in or on the side of the shower and sensors will be able to tell when you've started your shower.
First the Waterpebble will flash green for 3 minutes, then orange for 30 seconds and finally red for a further 30 seconds - signalling the end of the 4 minutes, which should be the end of your shower.
The Waterpebble will not turn your shower off, you do not have to stop, the idea is simply to start retraining you to shorten your shower time. This will massively reduce your carbon footprint and should save you over £1,000 in its lifetime!
Once the 4 minutes is up, the Waterpebble will flash all colours for 30 seconds and then turn off - it will turn on automatically once the next shower has begun.