Be amazed as the Spirit Clausometer comes to life on this Elf Heat Change Mug when the mug is filled with a hot beverage. As your drink cools down the mug reverts to its original look ready for you to enjoy the transforming action the next time you have a steaming hot brew. The back of the mug features the classic line from the movie Elf “The best way to spread Christmas cheer is singing loud for all to hear” which Buddy says to the Gimbels Department Store employee, Jovie.Packaged in a full colour gift box the Elf Heat Change Mug makes the perfect present for fans of this classic American Christmas comedy movie. It is also a great Secret Santa gift for that hard-to-buy-for friend, family member or colleague