An apparatus for mixing material in a container includes a platform mounted for simultaneous movement on at least two axes and for supporting a container containing material to be mixed. A motor can be operatively associated with the platform to move the platform on the two axes. A container holding assembly having a vertical extent can be carried by the platform, and is moveable between a closed position in which the holding assembly is positioned proximate the container to retain the container on the platform during mixing operations, and an open position in which the holding assembly is positioned away from the container so that the container can be removed from the platform without lifting the container over the vertical extent of the holding assembly. The platform can be contained within a housing having a low profile opening such that the container can be removed without elevating the container.