I know if you do subscriptions at Amazon.com, you get 15% off and free shipping. So, that's how you save money. We get diapers, wipes, pull ups, and toilet paper through Amazon.com subscriptions. I LOVE having delivered to my doorstep! You just tell them how much to send and how often (once a month/every two months/etc.). No all products are available for subscription though, so you might end up getting a brand that you're not used to. You should check it out though.