Rubbermaid FreshWorks Produce Saver Containers w/Lids keep produce fresher longer. The FreshVent technology filter naturally regulates the flow of oxygen and carbon dioxide to to create the optimal environment for your fresh produce. An elevated base lifts produce away from moisture and promotes proper airflow to prevent spoilage, while the modular, space-efficient design makes storage and kitchen organization easy—bases nest inside each other and one lid fits multiple bases to keep cabinets tidy. These plastic containers are BPA-free and dishwasher-safe for easy care. Set includes one 7.2-cup medium and two 18.1-cup large containers and lids.