These Rectangle Container lids are made of durable plastic; this lid provides the optimal visibility of your freshly-made foods and take-out items. The shape of the lid even makes it stackable and easy to store. Use this clear lid to showcase your snacks or entrees. These lids can fit on various container sizes such as 400, 500, 600, 800, 900, 1000, 1100, 1300, 1500 and 1700 ml rectangle plastic containers.