It is either ingenious or crazy but this water clock seems to be a bit sophisticated unless you know the manner of operation that it runs on. This clock consists only of two tiny discreet balls, anyone glancing at them would never know what they are. Actually even after you have them all set up, it may take you a long while to figure out what time it is exactly. With this around though, you get to choose the china you put these within, giving it your own personalized look.
They are two little magnets, the red one shows hours, whereas the small white ball shows the minutes. Choose a cup and then a small plate, add water to them and drop in the magnets. It then keeps time and there’s not even a need for batteries. It doesn’t entirely explain how it all works, but I’m sure if you order it they’ll give more instructions on that sort of thing. Despite that this is merely consisting of two little magnets, this clock is a bit on the expensive side. The Water Clock will cost you $299.
(Source) Technabob via Coolest Gadgets
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