This color-changing mug is a super popular gift for friends and loved ones. The heat-reactive surface reveals the design, "I Secretly Celebrate Christmas All Year Long" once the mug gets warm. The ceramic cup will go back to its original black outside and white inside when it cools down. The C-shaped handle helps keep a sturdy grip. It comes in one size – 11oz (0.33l) – plenty for that big morning cup of coffee.
