Abstract: Insulators for multi-container packages and products including multi-container insulators are disclosed. In some embodiments, beverage insulators include sleeves of resilient insulating material which can be slid over multi-container beverage packages. The sleeves can tend to conform to the periphery of the package and can collapse toward the remainder of the package when a container is removed from the package. The insulator can include a panel attached to an end of the sleeve and defining an opening through which the package can be grasped. The inside of the sleeve can include a scuff guard. A flap can be attached to an open end of the sleeve to cover the multi-container package. The insulator can be dimensioned to hold a four, six, twelve, eighteen, or twenty-four container package. Methods of advertising using multi-container beverage insulators are also disclosed. Some methods include using multi-container beverage insulators for advertising.