The Vial trays are directly un-loaded to the vial tray from which it is pushed on to the turn-table. The turn-table slowly and steadily feed vials to the two tracks feed worm, where vials are automatically inverted. The synchronized star-wheel places two vials, one by one to the two tracks indexing chain. The indexing chain positively carries inverted pair of vials through seven sequential washes. At the end of washing operations vials are reinvented back into original position and collected in the tray.