There's A Chance This Could Be Butterbeer Coffee Mug - Funny Coffee Mug - Coffee Mug Gift - Harry Potter Butter Beer There's A Chance This Could Be Butterbeer Coffee Mug - Funny Coffee Mug - Coffee Mug Gift - Harry Potter Butter Beer This funny coffee mug is a perfect gift for a boss or friend. Coffee Mug is 15 ounces. Funny Coffee Mug is dishwasher safe. Ship and sold from Holmes Stamp & Sign.