Who doesn't love a good surprise? Prepare yourself for a cool surprise with this color-changing coffee mug. This mug has a black matte finish when empty. But when it comes into contact with a hot drink, the mug shows a nice print that will put a smile on your face.

 • ceramics
 • Height: 9.8 cm
 • Diameter: 8.5 cm
 • Black matt finish when cold
 • Displays pressure when exposed to hot liquids
 • NOT dishwasher or microwave safe
 • Empty product from China

 Note that in some cases the coating may not be 100% opaque and an outline of the design may show a little through. You also shouldn't put the mug in a microwave or dishwasher, as this can damage the coating.