a plastic container having a storage chamber which graduates from a shoulder section into a bottle neck , in such a way that the length of the bottle neck can be changed about its axis . thus , this invention provides a constriction between the shoulder section and a pour - out area . the constriction is adjacent the shoulder section and is followed by an area which can be axially compressed . the constriction can serve as a sealing area . liquid , free - flowing and pourable media can be discharged in doses using a metering element which is fixed to the top of the bottle neck and which penetrates the constriction . by exerting pressure on the metering element , it is possible to establish an open or closed connection between the metering element and the storage chamber of the plastic container .