Heat changing mug, the mug is black in cold, when pour in hot liquid, it will turn white and appear the printing image Ceramic coffee mug, which is durable and heat-resistant, perfect for coffee, tea, hot cocoa, hot milk and more The size is 3.7 inch x 3 inch, volume is 11 oz(350ml), this heat sensitive changing mug is hand wash only, not safe for microwave or dishwasher Funny cat coffee mug, a gift mug for family, friends, coffee lovers, a great gift for birthday, Christmas, New Year and other holidays [100% Customer Satisfaction]:30 days money-back, when you are not satisfied with our product or you have any question, please contact with us to get a after-sale service, we will give you a satisfied response within 12 hours