Attach this Smart Faucet water-saving lever to any tap, and the water runs only when you're pressing against it, keeping you from leaving the water running. If pushing against a metal bar while you rinse your hands is just too annoying, it also lets you flip it into a continuous-flow mode.
Depending on where you live, you might not save that much money by conserving water, but if you're using hot water, you can save the gas or electricity needed fire up the water heater. Either way, this beats the hell out of those balky infrared auto-on faucets we loathe in public bathrooms, or worse, working for your water.
Via The Green Head