Device for closing (31) a container, said device (31) comprising a body (33) capable of covering and protecting an orifice of said container, said body (33) having a flat surface (5) intended to come into contact a parallel flat surface of said container, said device (31) being characterized in that it comprises: an optical system (37) making it possible both to define a substantially sealed volume above said orifice of the container and to realize a magnified image of a body surface (8) of a user of said device (31), when said body surface (8) is positioned in contact with said planar surface (5) of said body (33)； a lighting member (19) capable of illuminating said body surface (8) when it is positioned at the flat surface (5) of said body (33), said lighting member (19) being arranged in a internal zone of said sealed volume formed by said body (33) and said optical system (37)； an electronic control system of said lighting member (19)； - An electrical member (42) for controlling the power of said lighting member (19).Dispositif d'obturation (31) d'un contenant, ledit dispositif (31) comportant un corps (33) apte à recouvrir et protéger un orifice dudit contenant, ledit corps (33) présentant une surface plane (5) destinée à venir au contact d'une surface plane parallèle dudit contenant, ledit dispositif (31) étant caractérisé en ce qu'il comporte : - un système optique (37) permettant à la fois de définir un volume sensiblement étanche au-dessus dudit orifice du contenant et de réaliser une image grossie d'une surface corporelle (8) d'un utilisateur dudit dispositif (31), lorsque ladite surface corporelle (8) est positionnée au contact de ladite surface plane (5) dudit corps (33) ； - un organe d'éclairage (19) apte à éclairer ladite surface corporelle (8) lorsqu'elle est positionnée au niveau de la surface plane (5) dudit corps (33), ledit organe d'éclairage (19) étant agencé dans une zone interne dudit volume étanche formé par ledit corps (33) et ledit système o
