To use this mug, simply fill it with your favorite hot or cold beverage. It's suitable for coffee, tea, or even juice. When it comes to cleaning, you can wash it by hand with mild dish soap and warm water. Avoid using abrasive sponges as they may scratch the glazed finish. Store it in a safe place to prevent it from breaking. With proper care, this mug will last you a long time and keep bringing you the magic of Harry Potter.