System of closure for a pot presenting a non-circular neck

Pot comprising a neck capable of being obturated by a stopper comprising an upper wall applied on the end face of the neck and a peripheral skirt surrounding the neck, said neck and said skirt comprising cooperation means to allow said neck to be stopped by screwing said stopper, wherein

• said neck and said skirt present non-circular cross-sections having respectively two orthogonal planes of symmetry passing through their axes, and the cooperation means comprise a ring of non-circular contour formed near the end face of said neck and extending radially towards the outside,
• at least two catches formed on the inner face of the skirt and lying in one of the planes of symmetry of the stopper near the inner face of the upper wall, said catches being intended to cooperate with the lower face of the ring, and the contour of the ring presenting diametrally opposite notches located in a plane offset with respect to the planes of symmetry of said neck in order to allow the passage of the catches when the stopper axially approaches the neck.