This Magic Mug is the coolest thing around! A plain black matte when empty, simply fill it with a hot beverage to reveal the Tiny Ninja! 

• Ceramic
• Black matte finish when cold, reveals the Ninja when filled with hot liquid
• Hand wash only
• Dimensions: height - 3.85" (9.8 cm), diameter - 3.35" (8.5 cm)
• Made in China. Printed in Europe

Note that in some instances the coating might not be 100% opaque and an outline of the design might peek through a little. Also, you shouldn't put the mugs in a microwave or dishwasher since it can damage the coating.