OK we have decided to bring a cooler with us to bring in sandwiches and juice boxes for the kids while there. My ? is this I bought a soft cooler that will hold 20 cans of soda and has little pockets on the side and on top and came with 2 water bottles.. I am thinking it should fit in the bottom of the stroller hopefully..but does Disney have a size limit for coolers??? and what is the size limit??