Color-changing mugs are unique drinkware that change color when filled with hot liquids. These mugs typically feature a special heat-sensitive coating that reacts to temperature changes. When a hot beverage, like coffee or tea, is poured in, the mug's surface transforms, revealing vibrant colors or patterns. These mugs are popular for their fun and interactive design, making them great gifts or conversation starters. They come in various styles, often featuring themes from cartoons, movies, or art. Color-changing mugs not only serve a practical purpose but also add an element of surprise to your daily routine.