Abstract: An apparatus for mounting caps onto fluid containers in a predetermined particular orientation relative to the fluid containers. Caps are drawn from a source of caps and placed singly, in succession, on a cap seat which is in a particular known orientation. Each cap is taken, while on the cap seat, to a delivery position. During transfer to the delivery position, each cap is aligned into a known particular orientation. A device for picking up the caps takes each cap from the cap seat to a container and mounts the cap onto a waiting fluid container, in the desired predetermined orientation with respect to the fluid container. The device includes an operatively associated clamp that supports the fluid container about a flange around the neck to prevent crushing of the fluid container during mounting of the caps.