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If you pack a sandwich for lunch in the morning, if it's not refrigerated, it should still be good at lunch time. You shouldn't keep it not refrigerated any longer than 3 to 4 hours at the most. Refrigerated, it should be good all day if it's sealed in a sandwich container or baggie. Any longer than a day may cause the bread to be either too dry or too soggy.

It's funny though, us old-timers didn't have ice packs and coolers. Our lunches were packed before we left for school, 7:00 am, and we didn't eat them until some wheres between 11:00 am till 1:00 pm. So even more then 4 hours you could be okay. It also depends on the heat level. NJ sun vs. FL sun will cause different end results.

Most food has too many preservatives in them, so it's mainly the food quality that you are looking at.

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11y ago

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