We had to find it! A mug that represents a simple maze when cold and becomes more complicated with lots of little Packmans all colors when it's hot, it's really funny. When the mug cools, small Packmans disappear, allowing his tea (or other) at the right temperature. It's cute, it is unusual and enjoyable to watch. Our second youth surfaced with small Packmans just too adorable. For the price ...