Quantum / Economical Water Tap

Do you know, how much water you use every day? To clean a dirty cup, wash your hands? Quantum enables you to control your water consumption. You just have to adjust the desired amount of water by pulling up the handle to the right mark. Release it, and the water begins to flow, while the handle sinks accordingly. You can use up to 5 liters at once at constant water pressure. Quantum does not need any electricity around as it uses the existing water pressure. But will you manage to reduce your consumption? How much water do you really need?
Quantum helps you to find out!