The plural of formula is formulae: that's just one of the many things you'll learn by owning this mug. Enjoy drinking a hot or cold beverage from this greatest hits collection of all the world's most important mathematical discoveries, from E=Mc2 all the way to the quadratic equation. It's even got annotations depicting what each formula is used for, so you'll look smart while quoting Planck's Equation right off the mug.
12 oz. capacity