This week at Walgreens, Listerine Whitening mouthwash is on sale for $4.49. Use a new printable coupon to save $2.00! Page 9 of this week’s Walgreens ad contains a Beauty Points Booster coupon. Scan the in-ad coupon to earn 50 Points for every $1.00 spent (before manufacturer coupons) on beauty, personal and oral care products. Get whitening mouthwash for $2.29!