There has been no dearth in designs that harp about water conservation, and adding to the list is the Shower Brake. This one suggests that we kinda allot ourselves a quota, and use that bit only. The water controller sucks in a designated amount of water (when pushed up) that is ideally sufficient for a shower. As the quota depletes, the visual stats of the controller descends at a constant rate, letting you know how much water you used over number of minutes. The time of the shower is directly proportional to the amount of water used.
Designers: Sang-in Lee & Dae hyun Kim