Cambro RFS1SCPP190 Seal Covers, Set of 6 (For Camwear 1-Quart Round Storage Container, Translucent, Polypropylene, NSF) Seal cover fits Cambro's1 quart Camwear Round Storage Container Inner and outer seal provide excellent spill resistance and extends product freshness Snap on covers fit tightly, yet can be easily removed Thumb tab for easy removal Safe to use in refrigerators, freezers and dishwashers; NSF approved