How do I go out on a meal and clean the retainers where there would be nowhere to clean them?

I have clear essix retainers in and I have an outing where I would be eating and there would be no where to clean the retainers Also there will be a lot of people there and I don't want to take it out in front of everyone. I also am very self conscious and would it be OK if I take the retainers out for a few hours or would my teeth move since I have to wear them full time for three months

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