For some people, a puzzle's just a beautiful and inexplicable landscape until they've hadthat first cup of coffee.

This officialMyst mug was designed by Audrey Waner. Its color changes when you fill it with something hot. Each one comes with abonus coaster.

Hand-wash only—high temperatures will damage the color-changing effect. Keep in a cool, room-temperature locationaway from direct sun, UV, temperature extremes, and long exposure to fluorescent light.