The next time you are at Walmart, take a look by the checkout to see if you can find the small Robitussin To-Go 2 ct containers. If you do, try this deal:
Robitussin To-Go 2 ct $1
Use $1 Robitussin printable coupon
Final Price: Free!
These may not be at all locations, but be sure to take a look around and be sure to bring your coupons with you! New items are popping into Walmart stores all the time!
(Thanks I Heart The Mart!)