Faucet Buddy is a faucet accessory that measures and displays the amount of water used, as well as the temperature of the water. Built by designer Baek Uyeol who won a Red Dot Design Award for his effort. It’s still in the prototype stage, but I could see a decent sized market for this product in higher end homes. It appeals to safety concerns by helping you prevent scalding the little ones, and it appeals to to the environmentally friendly crowd by reminding one not to waste water. The designer even talks about adding wireless capabilities so that you can track the history of the water usage over time.