grammarRULES! Diner Style Coffee Mugs - Proper English Lessons on a Heavy Duty Coffee Mug (to lie or to lay?) Heavy duty ceramic style diner coffee mugs serve up more than just a cup of hot java or tea. Each mug cleverly explains some of the most misused rules of english language grammar. Created by a former teacher and artist, these mugs were designed for the grammatically aware  and those who need to be! Fun and educational, theyre sure to be a hit among all lovers of our language - including teachers, authors, literary scholars, and followers of Grammar Girl. Also makes a great graduation gift. Mug holds 12-oz. Collect all six (see the complete line by searching "grammarRULES!") and save on shipping - but Hurry, these mugs are HOT! FRONT: to lie or to lay? That is the question. One's grammatical reputation rests on this choice: when to lay and when to lie. BACK: daily grammaticism: "Lie" means to recline. I lie down. I am lying down. Easy. But yesterday I lay down. So the past tense of lie is lay? Who knew? Then, boldly you say, "I have lain here all week." Yes, lain, with an n. "Lay" means to place or put, and it needs an object. "I lay my keys here." For the past tense, use laid. (Supply your own "conjugation joke.)