Drink coffee; drop a hint.

Safe for microwave and dishwasher
These sturdy diner mugs hold not only 10 ounces
of your favorite steaming hot beverage, they hold
the very future of the English language.
Each mug boasts a small grammar lesson on the back, giving
you lots to read as you drink alone, having alienated all of
your friends with your grammatical superiority.
Below, Grammar Baby drives home the point.