Rembrandt Premium Whitening Mint Toothpaste with Fluoride, Extra Gentle, 3-Ounce for $4.02 shipped after clipping this coupon for $1.5 off and selecting Subscribe & Save to take an additional 15% off and receive free shipping. Here is a screenshot for your reference. Note that you need to sign in to your Amazon account to see the coupon. You can cancel Subscribe & Save easily with a few clicks after your order ships. This gentle whitening formula is specifically formulated for people prone to canker sores.