Grandpa Typography Definition Mugs Grandpa Mug, Grandpa Coffee Cup, Ceramic Grandpa Mug, Father's Day Gift By Tumbleweed Tumbleweed Coffee Mugs Have Photo Quality Designs On Each Side.. All Tumbleweed Mugs hold approximately 20 ounces, perfect for coffee, teas, and hot chocolate.May vary slightly. Hand Wash to ensure mugs and mug designs last for years to come. Made From Quality, Durable Ceramic, This Is The Perfect Drinkware Mug Or Office Decor Mug To Hold Pens, Pencils, Paperclips And Candy. Mug Is Microwave Safe. Careful: Sometimes Mugs Can Be Hot. Handle All Hot Objects With Caution.