i havent been on a cruise yet (we leave 3/23/02!) but from what i have read here on these great boards, there is a room "cooler" that is not quite like a refrigerator. it works better keeping cold drinks cold than putting them in warm; it apparently takes like a day and a half to cool can sodas down. but it should be perfect for small insulin bottles. the real challenge will be keeping those blood sugars down with all that food around!