Get free Robitussin Medi-Soothers at Walgreens! Use a $1.00/1 coupon; it doesn’t have any size or product restrictions, so it can be used on the small four-count boxes. The Medi-Soothers are regularly $1.00 at Walgreens. I found them on an end-cap of the medicine aisle at my store. Use the coupon for an easy freebie!
Note: The four-count boxes are not available at every store.