Hydro LED Shower Head – $120
HYDRAO lights up the water spray with different colors depending on the amount of water used. Powered by the shower’s natural water-flow, no external power supply is required. It basically allows you to control your water consumption and the energy needed to heat it.
The lighting turns green, yellow, and finally red, which would indicate that you’re wasting water. (You can customize the colors however you like). It even comes packaged with an app that tells you how much water your household is using. The whole point is to save water, a point of particular interest to people all over the planet.