To use this Harry Potter - themed mug, simply fill it with your preferred hot or cold drink. It's suitable for coffee, tea, or any other beverage you like. When cleaning, it's best to wash it by hand with mild dish soap and warm water. Avoid using abrasive sponges as they might scratch the glazed finish. Store it in a safe place, away from other hard objects to prevent chips or cracks. With proper care, this mug will serve you well for a long time.