We picked up a wonderful folding cooler, thinking we would pack it in suitcases (~$10 last year) at K-mart. We love it! We actually pack it with snacks (in Tupperware containers, so they won't squish..then use containers for ice) and check it. I swear they treat it nicer than our suitcases. Once there, we put ice in tw containers and put our milk/cheese/drinks in it. When it's time to go home, we stack our tw containers together (to conserve room),put our dirty laundry in the cooler, and use our suitcases for souvernirs.