Hey, math fans! Since you can't actually listen to a mathematics greatest hits album, we decided to create the next best thing -- meet the Math Mug. It's 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 like this, making it a superb gift for any mathematician, physicist, or math teacher. All in all, it adds up to a pretty terrific coffee mug.