Push-pull closure for a drink container, comprising: • a mouthpiece holder, which has a through-opening and means for holding, by way of which it can be sealingly and detachably fastened on the edge of an opening of the drink container, • a pin, which projects into the through-opening of the mouthpiece holder, wherein a circumferential gap exists between the pin and the through-opening of the mouthpiece holder, • several bars, parallel to the pin and arranged around the pin, which are connected to the mouthpiece holder at the top and to the pin at the bottom, • a mouthpiece with a further through-opening for a beverage, which can be inserted into the circumferential gap so as to be axially displaceable and sealing with respect to the mouthpiece on the outer circumference and accommodating the pin in the further through-opening, • at least one circumferential seal element between the pin and the further through-opening, which blocks the passage of liquid through the further through-opening in a closing position of the mouthpiece in the mouthpiece holder, and unblocks the passage of liquid through the further through-opening in an opening position of the mouthpiece in the mouthpiece holder, characterized in that • several ribs of a soft elastic material are provided, axially extending on the circumference of the mouthpiece at the bottom, between which there are axially extending free spaces, wherein the mouthpiece may be inserted into the mouthpiece holder, so that the bars engage into the free spaces and the ribs engage into recesses between the bars, stopping surfaces present at the top edge of the ribs bear against the bottom side of the mouthpiece in an upper position of the mouthpiece, and the bars bend over neighbouring ribs into the free spaces when the mouthpiece is rotated with respect to the mouthpiece holder, and the mouthpiece may be pulled out from the through-opening under reduced extraction force. • a mouthpiece holder, which has a through-opening and means for holding, by way of which it can be sealingly and detachably fastened on the edge of an opening of the drink container, • a pin, which projects into the through-opening of the mouthpiece holder, wherein a circumferential gap exists between the pin and the through-opening of the mouthpiece holder, • several bars, parallel to the pin and arranged around the pin, which are connected to the mouthpiece holder at the top and to the pin at the bottom, • a mouthpiece with a further through-opening for a beverage, which can be inserted into the circumferential gap so as to be axially displaceable and sealing with respect to the mouthpiece on the outer circumference and accommodating the pin in the further through-opening, • at least one circumferential seal element between the pin and the further through-opening, which blocks the passage of liquid through the further through-opening in a closing position of the mouthpiece in the mouthpiece holder, and unblocks the passage of liquid through the further through-opening in an opening position of the mouthpiece in the mouthpiece holder, characterized in that • several ribs of a soft elastic material are provided, axially extending on the circumference of the mouthpiece at the bottom, between which there are axially extending free spaces, wherein the mouthpiece may be inserted into the mouthpiece holder, so that the bars engage into the free spaces and the ribs engage into recesses between the bars, stopping surfaces present at the top edge of the ribs bear against the bottom side of the mouthpiece in an upper position of the mouthpiece, and the bars bend over neighbouring ribs into the free spaces when the mouthpiece is rotated with respect to the mouthpiece holder, and the mouthpiece may be pulled out from the through-opening under reduced extraction force.