UCEC Color Changing Heat Sensitive Mug - Coffee, MilK, Tea Cup- Battery Morph- with Stainless Steel Tea Stainer-Black Magic Mug--Changed colors with heated water. Little battery thing will become green image. When add hot liquid.the cup will restore original when cooling. Funny Gift-A great choice as a special gift for your friends and family! Funny idea and interesting design. High quality-- Ceramic, 100% brand new, high quality, durable. Free tea infuser, Silicone Tea Man design, interesting to add flower tea etc. Note: Please dont use in dishwasher or microwave. Don't wash it with hot water. Package included: 1 x Color Changing Heat Sensitive Mug. 1 x Tea Infuser