To use this mug, simply pour your hot or cold drink into it and watch the magic happen as the design changes with the temperature. When you're done, make sure to wash it by hand. Don't put it in the dishwasher as it may damage the heat - sensitive design. After washing, dry it with a soft cloth. Store it in a safe place to avoid any chips or cracks. Enjoy your Harry Potter - themed coffee time with this amazing mug!
