Pick up this great gift idea. Give your favorite brew an exponential boost with a heavy duty mug made for the math elite. Featuring equations and formulas ("handwritten" on a chalkboard-colored background) that would make your high school calculus teacher proud this smart design is perfect for number-crunchers and coffee and tea drinkers alike. Made in China. Essential Details: Made from ceramic Measurements 4" H x 3.75" diameter; 10 oz. capacity Notes: Dishwasher and microwave safe