Abstract: A cup holder and convenience tray assembly for a motor vehicle employs one or more support brackets that mount onto vertical columns at the front of the passenger compartment. The brackets have a clamp member with an vertical aperture of oval cross section which has a major axis oriented in the fore-and-aft direction. Each bracket also has a vertical socket positioned on the clamp member aligned along the major axis of the bracket aperture. The cup holder or similar accessory has a vertical pin that fits removably into the socket of the support bracket. Rubber petals help secure the beverage container and suppress rattling, and an embossed rubber member in the base breaks capillary seals. The convenience tray has a flat support shelf and a pin or pair of pins extend downward from a rear portion of the flat support shelf, each pin fitting into the socket of a respective support bracket. The accessories may also take the form of a vase, a cellular phone stand, or a picture frame.