Frigidaire Rectangular Food Storage Container - 32.5 fl oz/960 ml Air Tight - The seal helps prevent oxidation and keeps food away from humidity preserving freshness for long periods of time. Durable - Tested by simulant machine, the ears on the cover can be opened and closed more than 400,0000 times while keeping the shape. Silicon seal - The hollow silicon seal has better flexibility than other materials allowing an air tight closure./ Wash carefully with soap and warm water Remove lid before placing container in microwave.