useless when wet

I watched a demo video and thought this would be a good thing to have as I always seem to not be able to find the right cover for my plastics and sometimes I just want to cover the bowl without transferring it to a plastic container. I tested the little size over my cover cup and not a drop got through when I turned it over. It stretched easily and there were enough sizes to cover a good array of sizes and the container doesn't need to be round. However, when the dish has been in the refrigerator, there is condensation that forms on the outside. The covers will not stick to the bowl when it is wet. That was quite frustrating as then, I had to pull out the plastic wrap.

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