Method and device for producing containers which are filled with a liquid filling substance

A method for producing containers made of a thermoplastic material filled with a liquid filling substance from parisons, comprising the steps of:

• thermally conditioning the respective parisons;
• and
• subsequently simultaneously shaping and filling each parison in a mold using at least one carbonated liquid filling substance as a pressure medium in the container during a simultaneous shaping and filling phase, wherein the parison is, during shaping at least intermittently guided by a stretching rod and stretched in an axial direction, wherein the filling substance or portions of the filling substance are introduced at least at two points in time and/or in at least two process phases with different proportions of carbon dioxide and/or at different temperatures, wherein at least the filling substance with the greater carbon dioxide concentration or the proportion of such filling substance is fed only through the stretching rod, wherein, in a second process phase chronologically following an initial process phase, the filling substance or the proportion of filling substance with the greater concentration of carbon dioxide is introduced only through the stretching rod, and in the initial process phase the filling substance or the proportion of filling substance with a lower carbon dioxide concentration is introduced either only outside the stretching rod or both through and outside the stretching rod.