Andree, I've been saving the thin, clear plastic shower caps that hotels have as part of the complimentary toiletries and using those for bowl covers for many years. I'm pretty sure it was PJ's suggestion I read in a KAF blog a long time ago. They work great; they're free; and since they don't actually touch the dough, I see no reason to be concerned about "food grade". You can reuse them a number of times before the elastic gets loose; at that point, I simply throw that one away and use a new one from my stash!

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