What's great about the fridges is that the door conveniently holds the 1.5 liter bottles they sell in the resort gift shops.
I take crystal-lite-to-go and make up one with iced tea and another one with lemonade, orange, etc.
Oh, and if you are coffee drinkers, like friends that I take, stop by the food court on your way back to your room each night and pick up a few of the liquid creamers. Leave them in the fridge and next morning, you can have your first cup of coffee with liquid creamer, instead of the powdered stuff!