Score two free bottles of Colgate Mouthwash this week at Walgreens! The small 8.45-ounce bottles are on sale for $3.00 each. Buy two and receive a $4.00 Register Reward at checkout. Use two $1.00/1 Colgate coupons from the 3/6 Smart Source insert. Pay $4.00 out of pocket, and then earn the $4.00 Register Reward.