Simply select the shampoo formulation(s) that are specifically designed for your pet's skin and coat. We'll send you three 2 oz. replacement cartridges for those formulation(s) every 60 days. HydroSurge® RapidBath® Shampoo Cartridge Continuity Program: # of Sets Shampoo Type 1 Set 2 Sets Ultra Cleaning Shampoo 1 Set 2 Sets Hypo-Allergenic Shampoo 1 Set 2 Sets Deodorizing Shampoo 1 Set 2 Sets Oatmeal Soothing Shampoo 1 Set 2 Sets Shine & White Shampoo Cancel anytime - no obligation. Join the 3 Minute Bath Club today to begin enjoying convenient at home delivery without interruption! Your credit card will be billed $9.99 plus $5.95 shipping and handling as your shampoo is shipped every 60 days. If you are not satisfied for any reason, you can cancel or change your order by calling our toll-free customer service number, 1-877-786-4358.