Does the security guard just dig through all the ice to ensure no weapons are hidden in there or just get annoyed they need to put their hands in a cold bag?
I was looking at smaller insulated backpack coolers that I could fill up with ice, put food and drinks in there, and then just carry it around during the day. Some of them keep ice frozen for 4 days in 97 degree Florida heat so using one for half a day at Disney would have everything remain cold during the summer months, ensuring my chicken tender subs stay fresh until I am ready to eat them.