Add a touch of humor to your daily brew with this math-inspired mug, the perfect gift for math nerds and math teachers alike! Large 15oz coffee mug double printed on both sides so it's perfect for both lefties and right handed adults Dishwasher & Microwave Safe - Permanently printed in our small Colorado, USA shop so it's a gift that will last for years of regular use as their morning coffee cup. Fun and useful gift, whether you're at the house or at the office, outside on the patio, or drinking from the couch at home this will make a perfect present. Coffee Stays Hot - Ceramic allows for slower conduction allowing for all coffees, cappuccinos, espressos, and teas to stay warm longer. Math is an Integral Part of Life Coffee Mug - Funny Math Nerd or Teacher Gifts for Women & Men - Large 15oz White Ceramic Mug