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"  The lid of this container is supposed to create a vacuum seal that the manufacturer claims &amp;quot;keeps food fresh up to 3 times longer.&amp;quot; It&amp;#039;s composed of a white hard plastic ring with a center that resembles a thick plastic wrap. Unfortunately, it didn&amp;#039;t work as promised. In our tests, it was poor at keeping air out. After being washed in the dishwasher, the lid could still be put on the clear plastic base but after being used in the microwave, it was badly damaged and had to be discarded. The lid is designed to be used on other containers, as well \u2014 any container with a smooth rim (even scalloped rims) whether metal, plastic, or glass. keepeez.com  "^^<http://www.w3.org/2001/XMLSchema#string>
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