Color changing mug, by definiton this mug can changed color.

There's some special meterial outside the mug, this mug are influenced ty temperture or the circumstances changing color.

Now in the market people talking about the color changing mug is "heat sensitive color changing mug"

when we put hot drinks or cold drinks in to the mug, the design outside the mug can changing image, picture, design once the temperture inside the mug changed. That made people feel very mysterious and suprise, and interesting. People also call that's 'magic mug'.