Chicago State Flag Color Changing Mug for Coffee/Hot Beverage/Tea Cups - Best Gift for Valentine's Day,Birthday,Anniversary,Christmas or New Year Material: 100% ceramic material Capacity: 11 Ounce When cold = mug shows a plain black When hot = mug will turn white and reveal your design Hand wash only.Can not be placed in the dishwasher. 100% satisfaction guaranteed.It holds liquids well and has a well designed large handle