Using this Harry Potter heat - changing mug is easy. Just pour hot or cold liquid into it and watch the amazing design transformation. For cold drinks, you'll see the text 'Waiting for my letter from Hogwarts' on one side and the Hogwarts logo on the other. When you pour in a hot drink, the image will change to a Hogwarts scene with Hedwig. Remember, this mug is for hand wash only. Use mild dish soap and warm water to clean it. Avoid using abrasive sponges as they might damage the heat - sensitive design. Keep it in a safe place away from sharp objects to prevent scratches. This way, you can enjoy your magical mug for a long time.
