A hook is very practical when using the Supplementary Nursing System (SNS). With a hook, the container of the SNS can easily be attached and detatched from the neck cord – with one hand. Thereby, the cord must no longer be threaded in or out for each cleaning.  An other problem without hook is, that a container which has the neck cord threaded cannot stand alone. The eyelets of the hook can be bent upwards and, following the insertion of the cord, can be bent down again.