This funny math teacher mug features the phrase 'Sometimes I Go Off on a Tangent' with a tangent line. Makes a great gift for an elementary, middle, or high school teacher! - Printed in the USA with a high gloss and premium white finish. - High quality sublimation printing. - Printed on both sides. Great for right or left handed people! - Dishwasher and microwave safe. Printed with ceramic inks that won't fade. - 11oz or 15 oz with traditional C handle.