The invention concerns a connecting element (10) for establishing a frictional connection with the neck portion of liquid drug container, like a vial. The connecting element (10) comprises a basic structure (1) and contact elements (2) connected with the basic structure (1) which provide contact surfaces (3) for contacting said neck portion. The contact surfaces (3) form between them a receiving space (4) for receiving the neck portion, which space (4) can be enlarged by moving apart, against reset forces, the contact surfaces (3). In order to make this possible, the contact elements (2) are designed as resilient structures which, at two ends thereof, are connected to the basic structure (1) and between these two ends provide their contact surface (3), so that these contact surfaces (3), under an elastic deformation of the respective contact element (2) between its two ends, can be moved apart against the reset forces generated by the deformation of the contact elements (2).By this design it becomes possible to provide a connecting element (10) which can establish a proper frictional connection with cylindrical container neck portions of varying diameters.
