A device for producing filled containers has a transport device which is configured for transporting containers which are filled with a liquid and are closed by a closure. Furthermore, the apparatus has a penetration device which is configured for producing an opening in at least one region of the closure and/or of the container, and an application device, which applies a flowable and in particular gaseous medium to the interior of the container through this opening (or feeds the gaseous medium to this interior). Furthermore, the apparatus has a closing device which closes the opening again.