This charming 9-ounce dolomite ceramic mug from Mud Pie's Circa collection adds a touch of holiday magic to your morning brew with its heat-sensitive, color-changing decal. Adorned with festive holiday characters and classic hand-painted base stripes, the mug transforms visually when filled with a warm beverage. Because of its specialized heat-reactive design, it requires gentle hand washing and is not safe for microwave use, making it a delightful, collectible keepsake or a perfect seasonal gift.