Cambro Container Cover 12/18/22 qt RFSCWC12135. Lock in your food’s freshness with this Cambro RFSCWC12135 snap on cover! This cover is made to fit 12 qt., 18 qt., & 22qt., round, clear Camwear storage containers. The snap on cover seals tightly, yet can be easily removed. Made of virtually indestructible polycarbonate material, this cover is durable and resistant to food stains. This cover works to keep foods and ingredients uncontaminated and organized for your convenience! With a temperature range of -40 degrees Fahrenheit to 160 degrees Fahrenheit this cover is perfect for use in refrigerators and freezers.