when we took 5 kids to wdw last march I gave each one of them a fanny pack to wear. I brought a couple of pkgs. of those capri-sun juice bags and I put them in the freezer (we had a suite with a fridge) the night before. Everyone put a few of the frozen bags in their packs and by the time they were ready for drinks the bags had defrosted but were still cold! this was great for my 6 yr. old who wanted a drink at the worst tims (like while we were in line). He didn't have to wait and we didn't have to lose our place in line!!!