A lipstick mechanism including an internal substantially tubular duct that rotates in an external substantially tubular duct, the ducts having longitudinal slots and helical slots that guide in translation studs of a lipstick-holder cup disposed in the internal tubular duct, the internal duct including a substantially cylindrical base with a restriction relief that bears elastically on a substantially cylindrical surface connected to the external duct, such that the surface connected to the external duct is elastically deformable and the restriction relief is formed by a raised area sunk in the surface.