3dRose Pi math number Mathematical modern abstract mathematic numeric figures Magic Transforming Mug 11oz

Make a math fanatic s day with the 3dRose Pi Magic Transforming Mug. The 11-oz coffee mug is solid black when it is cold; when you add hot liquid the cup transforms to white and an image appears. This math mug is suitable for tea coffee or any hot beverage. It makes a great gift; other designs are available (sold separately).