Hey there, math fans, since you can't listen to an album of math's greatest hits, we decided to create the next best thing – meet the Math Mug. It's a ceramic mug covered with some of the most famous and important mathematical formulas in history. You get gems like 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 in formulas like these, making it a great gift for any mathematician, physicist, or math teacher. All in all, it's a pretty awesome coffee mug. Holds 325 ml. Dishwasher and microwave safe. 325 ml mug. Dishwasher and microwave safe. From the Unemployed Philosophers Guild. Don't worry. We're employed, just not as philosophers. We're a small Brooklyn-based company specializing in gifts for the sophisticated gift-giver. Whatever your needs, we have gifts in mind.