Is Your Wrapper Wrinkled? color changing mug

Looking for a gift for a sarcastic friend or work colleague? This color changing mug is perfect! The heat-reactive surface reveals the design once the mug gets warm and then goes back to its original black outside and white inside when it cools down. 

.: Ceramic with black exterior and white interior 11oz
.: Heat-reactive design
.: C-shaped handle
.: Glossy finish
.: NB! Hand wash recommended
.: Print method is sublimation for permanent design
.: Printed on both sides
: Microwave-safe