14 Hour Amtrak trip need ideas on food to pack.

Hi, husband and I will do a 14 hour Amtrak trip leaving at 5 AM and arriving at 7 PM. I understand that Amtrak can serve a microwaved pizza or a cold sandwich. So, we'd like to take some better/healthier foods. There won't be room for big coolers but we can freeze water bottles and take a mylar cooler bag, etc. Thanks for any advice.

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