The invention relates to a liquid container, especially for drinks or mouthwash, comprising a removable closing element, for example a bottle with a screw top, and at least one volume that is not filled by the liquid.
The contact section (2) is brought into pressure contact with the peripheral surface (C22) of the screw cap (C2), and the needle (4) penetrates through the top surface (C21) of the screw cap (C2).
A screw cap (16), in use, seals against the plug (12, 21, 31).
The invention described herein is a shaped seal or gasket for use with a screw cap as commonly used in chemical barrels.
The gasket has a second surface, or zone of contact, for contacting against a second surface, such as the underside of a screw cap.
The bottle (20) is of the type having an open mouth (22) provided with screw thread, and which mouth (22) is closable by a screw cap (24).
The closure of the plastic bottle is a conventional screw closure.
Movement of the piston is controlled by a screw threaded cap engaging an external thread of the piston.