Thumb Score: +30 Amazon.com has 17oz Dental Fresh Water Additive for Pets for $3.19 or $3.03 when you checkout via Subscribe & Save. Shipping is free with Prime or Subscribe & Save. Thanks kb22003 Note, you may cancel your Subscribe & Save subscription any time after your order ships. Select the later date from the "First Delivery On" menu to get traditional S&S checkout instead of adding to your cart.