$1.50 in Savings on Crest Mouthwash Posted by Harbor Master on 14 November 2017, 6:10 pm Tweet The Coupons Expire 30 days from print (The print limit is two) Click here to print a coupon for 75¢ Off One Crest Pro-Health Mouthwash 237ml or larger (excludes trial/travel size) Click here to print a coupon for 75¢ off One Crest 3D Whitening Mouthwash 237ml or larger (excludes trial/travel size)