The Rubbermaid FreshWorks Produce Saver Containers feature a patented membrane that naturally regulates the flow of oxygen and carbon dioxide to create the optimal environment for fruits and vegetables. Use these containers to prevent store-bought and farm-fresh produce from spoiling when kept in the refrigerator. The FreshWorks Produce Containers are optimally sized to fit large amounts of strawberries, peaches and other fruits or to fit vegetables such as celery, rubarb, squash, zucchini and lettuce heads. The CrispTray at the bottom of each container elevates the produce away from moisture and promotes the ideal airflow to keep items fresh for 80% longer than if stored in grocery-store plastic bags.