a holder for containers , such as pop cans , beverage cups and the like has a back panel designed to be mounted on generally vertical support . the holder at its lower end has a base member to seat the bottom of the container and at its upper end a pair of arms designed to embrace and hold the container . the arms are supported on a track for independent sliding movement to provide adjustment of the size of the opening between the arms . detent means provide resistance to the sliding movement at various increments of spacing between the arms .