Abstract: A series of seven expandable/collapsible buttons, each engraved with a different abbreviated week day Monday through Sunday. These buttons would either be molded on a tab as part of a food storage container lid, or as a separate hinged tab with an adhesive back. These molded buttons would be placed on the lid's side, front, or lip. A consumer would place food into the container, expand the correlating day's button and refrigerate. Knowing the storage day would help determine food freshness for future use. Only seven days are used because food science instructs most foods should not be kept beyond 3-4 days refrigerated. Side button placement on the container allows the expanded button to be clearly visible to the consumer when containers are stacked. The buttons and the tabs may take on a variety of shapes as are necessary to fit the container that utilizes this system.