Certain examples of the present invention relate to a nozzle adapted to be received by a patient, said nozzle comprising a first body portion, having a first end and a second end, wherein a central aperture extends between the first end and second end and wherein the central aperture terminates in an opening at the second end； a second body portion, having a first end and a rounded second end； and at least one support arm that joins the second body portion to the first body portion and holds the second body portion at a set distance away from the first body portion,
