A method and a system for holding and mixing a first container of paint having a first volume and a second container of paint having a second volume less than the first volume. The system comprises a holder comprising a clamp having a plate configured to apply pressure to the first container. A motor is configured to move the holder about at least one axis. The platform is configured for being removably placed within the holder and configured to hold the second container. Another embodiment of the system includes a stop placed proximate an edge of the platform.