✨ Sip, Reveal, and Conjure Magic! ☕ BPA-free and toxin-free for peace of mind. Designed for the true Potterhead—hand wash only! A spellbinding gift for every Harry Potter enthusiast! Watch the Marauder's Map come to life with every sip! Transform your morning brew into a magical experience! 20 oz capacity Heat reveal magic Officially licensed The Silver Buffalo Harry Potter Marauder's Map Heat Reveal Ceramic Mug holds 20 oz of your favorite beverage and features a unique heat reveal design that unveils the Marauder's Map when filled with a hot drink. Officially licensed and BPA-free, this mug is perfect for fans of all ages, making it an ideal gift for any occasion.