This great freebie will be making a comeback at CVS! Starting Sunday, 12/21, Listerine mouthwash, Pocketpaks and floss will be on sale for $2.99. Purchase one and receive $2.00 ExtraBucks. Luckily for us there are two different $1.00 printable coupons for Listerine floss that will turn this deal into a small moneymaker! Print the coupons now, as they might not be available when the sale starts.