The invention relates to a device comprising at least a body (1′), a pusher (2′), and a plunger (3′) situated at the end of the pusher for providing sealing between the pusher and the body, the device being characterized in that at least one firstly of the entire inside surface (11′) of the body and secondly of at least a portion of the outside surface (33′) of the plunger (3′) is coated in a hydrophilic substance selected from sodium hyaluronate (HANa), polyvinyl pyrrolidone (PVP) of high molecular weight, polyethylene glycol (PEG) of high molecular weight, and hydroxypropyl methyl cellulose (HPMC).
