Rubbermaid Premier Containers are made with Tritan plastic that resists stains and odours.Plus, Premiers have Flex & Seal lids that are easy to seal and remove.Part of the Easy Find Lids system, Premier lids snap to bases and other lids so you will not have to search for lids again and nest together to take up less room in your cabinets.The crystal clear bases are perfect for easily seeing the contents of the container and the square shape allows for easy stacking and storage in the refrigerator.The new Rubbermaid Premier food storage containers are BPA free.