Abstract: An adapter for adapting a conventional cup holder to hold a wide arrange of containers. Furthermore, the adapter provides for a removable insert which can be used to further adapt the adapter to accommodate various container sizes and, in addition, optionally to provide insulation to the container to maintain the temperature of the drink in the container generally constant. The adapter includes an adapter body having a transverse passage for receiving a container which has a larger width than the cavity width of the cup holder. The body includes an upper body portion and a lower body portion, with the lower body portion having a smaller width than the upper body portion and for inserting into the cylindrical cavity of the cup holder. The body further includes a transition portion between the upper portion and the lower body portion which defines a rest for the container thereby adapting the cylindrical cavity of the cup holder to hold the container. The insert includes an upper portion and a lower portion.