The invention relates to a coupling closure for a docking device used for decanting, filling, and/or emptying containers, particularly in an environmentally isolated manner. The coupling closure has a closure side and a container side and comprises a nozzle stub and a cap which is mounted in the nozzle stub so as to be pivotable about an axis and has an external side that faces the closure side in the closed position. The invention further relates to a docking device for decanting, filling, and/or emptying containers, particularly in an environmentally isolated manner. The docking device comprises first and second disclosed coupling closures which can be placed flush against each other by the respective closure sides thereof. The invention also relates to a working platform, a locking unit for a docking device, and a method for decanting, filling, and/or emptying containers, particularly in an environmentally isolated manner.