Warm-up with a nice cuppa out of this French Bull Dog ceramic coffee mug. The mug changes color and will be the gift that keeps on giving for any Frenchie dog lover in your life. The heat-reactive surface reveals a happy puppy once the mug gets warm. The ceramic cup will go back to its original black outside and white inside when it cools down. Lead and BPA free. A perfect gift for yourself or other dog lovers!