Fluffernutters have always been a classic lunch to send in a kid’s lunch box. They are great for making ahead of time and packing for later because they don’t need to be refrigerated or reheated.  If you plan to pack a fluffernutter I would suggest enjoying it within the same day that you make it. You should also pack it in a hard container. All the ingredients of the sandwich are soft which make it susceptible to being squished.