Just add your favorite hot beverage and watch these mugs morph right before your eyes. Made of thermographic inks, these mugs react to heat, revealing new and fun artwork. As your beverage cools, the graphics change back to their original state.
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Reviewed by Daniel, 23/10/2017
Cool mug, awesome gift for a boy age 7.
Works as advertised, goes from black to green really fast and stays like that until cool although an adult can already drink while still green-not too hot.
can`t be machine washed and can`t be forgotten in water as it soaks too much and damages the function. Can`t be used in microwave either.
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