axis that extends parallel to the longitudinal axis of the rung insert member and equidistant from the front 36 and rear 38 walls of the container at or near the uppermost surface of the container the container holding portion 18 20 of the rung insert member has a length at least sufficient to pass through the pair of aligned openings in the container it may be any desired shape including the same shape as the rung insertion portion or a different shape preferably the container holding portion will be round as shown or at least have a rounded upper surface so that the container may freely rotate about its axis in addition the container holding portion may optionally include a container retention member not shown to prevent the container from accidentally slipping off the container holding portion the container retention member may be a notch in the container holding portion that engages a surface that defines one of the aligned openings or it may be a pin a clip a cotter pin or some other type of clasp inserted or attached along the container holding portion fig5 illustrates a second embodiment of the invention in this embodiment the container 40 includes a pair of aligned openings in the form of ear loops 42 that extend above the top rim of the container these ear loops are preferably affixed to the container at each end of the.