A method for producing a shopping list consisting of one or more items, wherein at least one item in the shopping list is a consumable item. The method on an e-commerce site comprising the storing data representing an inventory of items for sale at the e-commerce site. The purchase history of the items purchased by the consumers at the e-commerce site is stored along with the shopping list. A predetermined useful life of at least one item purchased in the purchase history by scanning a product code during the previous delivery of consumable items. The product code includes a date embedded therein. A useful life is predicted based on the rate of consumption by the plurality of consumers is stored. When a request is received from a consumer for a shopping lists to build an active shopping list the purchase history for the consumer to determine if a consumable item previously purchased from the purchase history has exceeded the predetermined useful life is reviewed. The consumer is able to authorize the addition of the consumable item previously purchased.