The invention relates to a receptacle, more particularly a bottle for a cosmetic product, to an associated manufacturing method and to an applicator assembly comprising such a receptacle. The invention relates in particular to a receptacle, more particularly a bottle, for a cosmetic product, said receptacle comprising a body forming a container and an intermediate part forming a reservoir, which is capable of containing the cosmetic product and of sliding within said container so as to move with an applicator of said product, under the effect of the viscosity of said product, when said applicator is removed from said reservoir and/or when said applicator is inserted into said reservoir.