Funny color changing coffee mugs made of high quality porcelain, the graphic of tea mugs appears color changing when pour into hot liquid. Cool coffee mugs a attractive mugs is perfect gift for your family, friends. Cute coffee mugs have color changing function, with print beautiful picture. Heat-sensitive mugs, microwave safe, but not recommended for use in the dishwasher, and the magic mugs color changing effect temperature need greater than 45 degrees.