Abstract: A continuous cycle bottling line (1) for containers of thermoplastic material comprises: a parison moulding unit (2); a blow-moulding unit (3) for making containers; a unit for filling (4) the containers; a thermal conditioning structure for the parisons, for heating (9) and cooling (8) the parisons in a heating module and in a cooling module, respectively; an automatic controlled-atmosphere storage system for containing the parisons and interconnected with the other parts of the line; a pressurization system configured to pressurize at least the following parts of the line: the storage system, the at least one blow-moulding unit and the connections between the thermal conditioning structure and the storage system; where the heating and cooling modules, alternatively or in combination, i) are pressurized, ii) have a plurality of shutters configured to occlude the opening at the end of each parison, so that the interior of the parison remains closed when the parison is inside the heating and cooling module.