Two or more of a bottle-cleaning operation, a bottle-filling operation, a cap-dispensing operation, and a cap-affixing operation simultaneously process arrays of equally sized containers in an x-y array by engaging the bottles with movable heads of a head-carrying assembly. The containers can be a compressed array of bottles or a case of bottles in a box or the like. The nozzles for the cleaning and filling operations, and cap-handling devices for the dispensing and affixing operations can be repositioned for change to a new container size, for example with motor driven positioners. At least a subset of the heads are displaced along the axes of the container array, into registry with bottle arrays of the different size bottles. Preferably, each operational system in sequence is independently controlled to effect a container size change, such that the production line can be changed to the new size as the leading edge of containers of the new size arrive at the respective operational system.