To use your Harry Potter Platform 9 and 3 quarters mug, simply fill it with your favorite hot or cold beverage. Enjoy sipping your drink while admiring the magical design. For the socks, just put them on as you would with any regular pair. When it comes to cleaning, hand - wash the mug with mild soap and warm water, then dry it thoroughly. The socks can be machine - washed on a gentle cycle with like colors. Avoid using harsh chemicals or abrasive materials on the mug and socks to keep the 9 and 3 quarters branding looking great for a long time.