The Colgate mouthwash coupon just reset! That means it can be printed again! This week at Walgreens, Colgate Total Advanced mouthwash is on sale for $3.00. Buy two and earn a $3.00 Register Reward. A Register Reward is good for store credit on a future purchase. Use two reset $1.00 printable coupons and get each mouthwash for $0.50!