a device for producing container products of plastic materials , particularly by carrying out a molding , filling and sealing method , includes a molding device that can be supplied with a molding tube of plasticized plastic materials and that has a movable molding surface , adapted to the predefinable geometry of the container . the molding tube can be laid on the molding surface for a shaping , filling and / or sealing process . a guide and retainer device includes movable guide and retainer parts able to be controlled to engage , outside the molding region of the molding device , on the molding tube itself and / or on the plastic material that surrounds each manufactured container product and / or its container .