This isn't the first water powered alarm clock we've featured here, and, like the last one, it's not exactly pretty, is it? It is eco-friendly, though: that's the battery on the side, and when it runs out you can simply top it up again straight from the tap, with each refill lasting two or three months.
As well as all of the ordinary alarm-clock functions, this clock also tells you what the temperature is, and contains a gravity sensor, so that when you want to switch from date/time to temperature, all you need to do is rotate it through 90 degrees.
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From: Five reasons Foursquare will be this year's Twitter