Reddit reviews Coleman Soft Backpack Cooler
We found 2 Reddit comments about Coleman Soft Backpack Cooler. Here are the top ones, ranked by their Reddit score.
Large zippered front pocket for dry storagePadded back and straps for comfort and supportAdjustable shoulder and waist straps
Can't you buy something like this and use that to carry your food? I don't know anything about it, but it had 4.5 stars with a lot of reviews and was fairly inexpensive. I'd make a lot of food that was good cold.
Also, do you go back to a central location at any point during the day or are you out from the beginning to the end? Could you store food in a larger cooler or a fridge that you stop at once a day so you didn't have to carry all of your food with you all day? If not, I would recommend finding something lightweight to package the food in. Carrying 5lbs of tupperware containers would be a pain.
You should look into what backpackers do. Here is an article about carrying food while backpacking. They normally aren't planning on carrying ice and are going for multiple days, so you could switch out a lot of the dried backpacker focused food for more fresh stuff, but keep the same ideals in mind when planning what you'll be carrying.
Get a cooler that looks like a backpack. This one holds over a case.
http://www.amazon.com/Coleman-C003-Soft-Backpack-Cooler/dp/B00LGVSR0W