From 9/11 to 9/17 Walgreens has Crest Mouthwash 1 liter on sale for $3.49 when you buy two bottles. Get Deal Details on Walgreens Deals List
Print 2 of the $2 Crest mouthwash coupons
Pay $1.49 each at the register = $2.98
Get $3.50 Register Rewards
Get 7 cents Everyday Points
Net cost: 2 Free bottles + 59 cent profit!