The Cambro (SFC6-451) winter rose square lid features an inner and outer seal that snaps on the appropriate sized Camsquare® container. This double seal helps keep foods fresh and prevents spills. There is also a thumb tab on the corner, so you can easily remove the lid. This red lid is sized to fit on the six and eight quart Camsquare containers. They are the ones with the red lettering, to match the lid and make it easy to know which lid goes on which container.