Pot for a cosmetic product including a base surmounted by a neck defining an opening and a lid designed to block said opening, said neck having a non-circular section, said neck comprising a rim forming a bead on the periphery of the neck, said pot being characterized in that said neck comprises at least one first assembly element formed in an outer wall of the neck under said rim, said lid comprising a contour wall designed to surround said neck when the lid is positioned on said neck in an open position or a closed position, in both of which the lid blocks the opening, said lid comprising at least one second assembly element formed in said contour wall and shaped to fit said at least one first assembly element, in such a way as to enable said at least one first assembly element to be engaged with said at least one second assembly element; said lid being designed so that: • when the lid is in the closed position: - said at least one second assembly element of the lid is arranged under the rim of the neck, preventing the vertical removal of the lid from the neck; and - said at least one second assembly element and said at least one first assembly element are engaged with each other to resist the relative rotation of the lid and the neck, and • when the lid is in the open position, said at least one second assembly element is disengaged from said at least one first assembly element and from the rim of the neck, to enable the vertical removal of the lid from the neck, said lid being designed to switch from said open position to said closed position and vice versa by rotating the lid about the neck. said lid being designed so that: • when the lid is in the closed position: - said at least one second assembly element of the lid is arranged under the rim of the neck, preventing the vertical removal of the lid from the neck; and - said at least one second assembly element and said at least one first assembly element are engaged with each other to resist the relative rotation of the lid and the neck, and • when the lid is in the open position, said at least one second assembly element is disengaged from said at least one first assembly element and from the rim of the neck, to enable the vertical removal of the lid from the neck, • when the lid is in the closed position: - said at least one second assembly element of the lid is arranged under the rim of the neck, preventing the vertical removal of the lid from the neck; and - said at least one second assembly element and said at least one first assembly element are engaged with each other to resist the relative rotation of the lid and the neck, and - said at least one second assembly element of the lid is arranged under the rim of the neck, preventing the vertical removal of the lid from the neck; and - said at least one second assembly element and said at least one first assembly element are engaged with each other to resist the relative rotation of the lid and the neck, and • when the lid is in the open position, said at least one second assembly element is disengaged from said at least one first assembly element and from the rim of the neck, to enable the vertical removal of the lid from the neck, said lid being designed to switch from said open position to said closed position and vice versa by rotating the lid about the neck.