Abstract: A container (10) includes a drum (12) and an agitator (14) positioned within the drum (12)for the mixing of the paint or other liquid contained therein. A one-piece conversion device (16) is installed in the drum's central opening (30), which is defined by a flange (32) having internal threads (34) of a certain diameter. The plug (16) comprises an annular base portion (70) and a hollow elongated portion (72), which together define a passageway (74). The annular base portion (70) has external threads (78) corresponding to the flange's internal threads (34) and internal threads (76) having a different diameter corresponding to a motor mounting component (54).