At a time when we're told to save water, here's a shower head that shames you into taking shorter ones. The Uji shower head will make you bad about how much water you're not wasting.

But actually, it's not like that. The tool is actually useful. Brett Andler, one of Uji’s co-inventors, says "It encourages [people] to take shorter and more energy efficient showers. It makes people become aware of how long they're in the shower allowing you to cut shower time by 12 percent.

The shower head has its own lighting and turns from green to red over the course of seven minutes. You'll be out in eight, at least according to the shower. Check it out in action below:

Uji, via NPR