Pac-man Magic Color Change Mug Ceramic Coffee Cup It is a good gift for friends children or lovers. Material:High Quality Ceramic Size:D8.2 x H9.5 cmCapacity: 11 fl.oz/400ml When you infunde hot water, the Pacman will appear on the mug.(pleae see below picture). When the water get cold,it will restore the original.(please see below picture) Please note:Do not microwave. Limit exposure to direct sunlight. Hand wash recommended as dishwashing might weaken the image heat sensitivity.