A deep black ceramic mug covered with some of history’s most famous and important mathematical formulas. You get gems such as Newton’s Second Law, Planck’s Equation, Hubble’s Law, the Fourier Transform, and the mother of all equations, Einstein’s General Theory of Relativity. The Math Mug is covered with formulas, making it a superb gift for any mathematician, physicist, or math teacher. All in all, it adds up to a pretty terrific coffee mug. Comes in its own gift box. Holds 14 oz / 400mL. Dishwasher and microwave safe.