The Waterpebble is a little device that monitors the amount of water going down the drain while you shower. After monitoring your first shower and using it as a benchmark, Waterpebble indicates via a series of flashing lights when you should finish showering. With every shower it fractionally reduces the time you're allotted, thereby helping you save water.

Here's how it works: Place in the shower near the plughole. Shower as normal. The lights will flash green, amber and red as Waterpebble memorizes your shower. Then each time you shower, it reduces the amount of time you're allotted fractionally. Waterpebble flashes green to show when to start, amber to signify when you're halfway through, and red when you need to stop.
You can purchase it through Dry Planet for £5.31 (about $8 USD) for one unit.
What do you think? Good idea or just another unnecessary gadget?


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... or you could just shower as quickly as possible and get out. Seems like a totally unnecessary gadget to me.
Meanwhile, on ApartmentTherapy... promoting a gadget to get more water in your bathtub.
It fractionally reduces the amount of water each time? Is it like Zeno's Paradox or do you eventually not get to take a shower at all?
I could see this being useful for shower-loving kids and teens, but flashing lights are not sufficient. It should have a siren and eventually shut off the water.
Very necessary! My room-mates do not get the whole "taking a 35 minute shower is no bueno!". I'm totally getting one and putting it in their showers!