After learning the ropes on our first WONDERful DIS cruise, we came prepared for our MAGICal second DIS cruise and had a cooler full of iced drinks in the car for our drive to Port Canveral from Atlanta. We then brought the chilled drinks on-board as carry-on, and got to our stateroom early and were able to load them quickly into the cool box. They stayed cold. As others note, when we put room temp drinks in the cool box on our first cruise, it took a couple days to cool them down.