A liquid transfer system is disclosed including a transport path that transports a plurality of vials through the liquid transfer system. Each of the plurality of vials has a cap that forms a seal with an open-ended vial body. The liquid transfer system is comprised of a vial capper/decapper assembly that is positioned adjacent to the transport path and includes a plurality of rotatable spindles. Each spindle has a rotatable shaft and a first projection supported by the shaft. The first projection also includes a cam surface that engages a cap of a vial so as to breach the seal and open the vial. The plurality of spindles is rotated simultaneously to simultaneously breach the seals and open the caps of the plurality of vials.