It includes a cap (10) produced in an elastic deformable material and adaptable to the opening (21) of a container (2) and pierced axially by an opening (11) in which a cylindrical body (22) is inserted tightly, one end of which, situated on the container side (2), penetrates into the opening (21) of the latter and which is integrated with the inner wall (24) of the said container (2) so as to form a space for the passage of the contents (23) of the said container (2). …IMAGE…
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