Using your Harry Potter mug is easy - just fill it with your favorite hot or cold beverage. When it comes to the socks, simply put them on and show off your Gryffindor pride. For the mug, hand - wash it with mild dish soap and warm water to keep the logo looking sharp. Avoid using abrasive cleaners. As for the socks, machine - wash them in cold water with like colors and tumble dry on low. This will help maintain the stripe design and keep the cotton soft and comfortable.