Easy to save water / tap

It’s quite common for many people to keep the water running while they lather our hands. But this is rather wasteful. So i want a tap that people naturally turn off the tap while they soap up hands.
The tap aims to make it easier to control the water during the operation. The switch is under the outlet and near the position of the hands. So it’s more convenient and efficient to control the water. It’s easy to operate with one hand.