Michelob Ultra 16 oz Coolie. Royal blue Michelob Ultra 16 oz coolie featuring the Michelob Ultra logo on one side with LIVE ULTRA on opposite side. This coolie folds for easy storage. How Coolies Work-Save your beer and buy a coolie! Coolies are normally made with a polyurethane foam, however the material normally doesn’t effect the coolies ability to keep beer cold. What actually keeps your beer cold is the prevention of condensation by snuggling up to the coolie. Condensation allows for the heat and humidity from the outside to have a lasting effect on the cold beer inside by forcing the cold to seep out the sides. In other words view condensation as the tears of your beer. Don’t let your beer cry, coolies save beer, buy a coolie and save your beer before it’s too late!
