If you want to "go green", this is not exactly the best product for you. Sure, it needs water to run but it is not "powered by water". Still, it's a funky little clock.
This would be a great gift for people who are into unique things. The different design of this clock would surely be a treat. Of course, there's no way of knowing it it is indeed quality made. I guess this would also be a great clock to hack.