4pk Crest 3D White Mouthwash $14.99
Amazon has this 4-Pack of Crest 3D White Diamond Strong Mouthwash in Clean Mint (16 oz bottles) for $14.99 or less with Free Shipping when you clip the $4 off coupon and checkout via Subscribe & Save. Click here to buy then "clip" the Extra $4.00 Off coupon located under the price. If you don't see the coupon, select the One-time purchase option and it should come up. After you check the box to add the coupon, select the Subscribe & Save option and you'll see the $4 discount applied at checkout.