The Muggle Struggle is Real Coffee Mug |15oz Funny Harry Potter Coffee Mug The Muggle Struggle is Real Coffee Mug |15oz Funny Harry Potter Coffee Mug Coffee Mug is 15oz. Mugs are double sided. Mugs are heat pressed at a high tempature so they are dishwasher safe. Mugs are from over seas but they are manufactured in the USA. Order today, ships tomorrow!