Temperature Sensitive: This mug is made of a unique temperature-sensitive material that changes the color of the pattern according to temperature changes. Battery Pattern Design: The mug is printed with a battery pattern that changes from light to dark when filled with hot drinks, as if the battery is fully charged. Interactive Fun: This mug not only holds your favorite beverage, but also provides an interactive experience, allowing you to enjoy the charm of technology while enjoying your drink. Exquisite Gift: This mug has a beautiful appearance and unique features, making it a great gift for family, friends or colleagues. Durable Ceramic Material: This mug is made of high-quality ceramic material, which is durable and can withstand high temperatures, ensuring long-lasting use.