I have just seen a review on the illuminated water tap which tells the user whether the water is hot or cold by showing red or blue. Then, a China made showerhead has the concept except it's only for fun. The users have the option to select 5 different colors but have no functions to detect whether it's cold or hot water coming out from it. Anyway, it looks beautiful.

___________________
Gift Gadgets and Gizmos Unique Gadget Review Blog