Amazon Subscribe and save
and Subscribe and saveStandard shipping is free with auto-delivery (non-Prime customers may incur shipping charges on their first delivery).
You can also easily cancel your subscription in your Amazon account without being penalized. This means that if you just want a lower price and don’t want a subscription, you can cancel your order immediately after receiving it.
You can also unlock additional savings select subscription by Clipping couponswhen you add 5 or more qualifying items to your monthly subscription, you’ll save an additional 15% on all items in your subscription instead of the usual 5% off.
Note – Before each shipment, Amazon will send you a reminder email indicating the product price and any discounts that may be applied to the upcoming shipment. The price of an item may increase or decrease from shipping to delivery depending on the item’s price at the time Amazon.com processes your order.
Source: Hip2Save – hip2save.com