Whether you pack extra snacks to tide you over between restaurant reservations or you pack your meals for the day, the one worry almost everyone has, is “How am I going to keep my food cool when it is hot outside?”
Backpack coolers are an ideal solution for this problem. Disney allows you to bring food into the parks, but they will not allow you to bring in hard-sided coolers, with or without wheels.
This one in particular is decently priced and it has gotten some good reviews on Amazon. Many have even commented on their experiences with bringing them to Disney World/Disneyland.
If you’re worried that your sandwiches will get squished, you can always spring for some sandwich containers. There are many places that sell them. I was even able to find some character containers at the Dollar Tree.