The present invention discloses a stopper composed of a hyaline port, a coupling,
a light emitting means, a buffer ring, an embedding port and an insertion. The
light emitting means is positioned in a top hollow of the coupling and then embedded
into a cave of the hyaline port. An insulated ring surrounding batteries is housed
in the lower hollow of the coupling. The coupling can be eventually screwed in
the embedding port deposited in the insertion. By screwing the coupling more tightly,
a lead beneath the light emitting means can contact with the battery to form electrical
conduction, and therefore the hyaline port exhibits fancy or identification effect.
