Rubbermaid Premier food storage container base is made with Tritan plastic that resists stains and odors. Plus, Premier container has Flex & Seal lid that is 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. Top-row dishwasher, microwave and freezer safe.