Dispenser for a composition in the form of powder in a container, and container of the feeding bottle type provided with such a dispenser

Dispenser for a powder composition in a container, comprising:

• a component forming a receptacle to contain the powder composition to be dispensed in the container, said component comprising an end wall provided with at least one orifice, a component forming an adapter comprising a tubular body provided with a transverse partition provided with at least one orifice and fixing means capable of engaging with complementary fixing means supported by the receptacle, the receptacle being rotatable on the adapter between a closed position of the dispenser, wherein the orifice of the receptable and the orifice of the adapter are not aligned with one another and an open position of the dispenser, wherein the orifice of the receptable and the orifice of the adapter are positioned in line with one another so as to make it possible for the flow of the powder composition contained in the receptacle outside of the latter, characterised in that the dispenser further comprises a sealing component comprising an upper annular part arranged to ensure sealing between the container and the adapter and a lower annular part arranged to ensure sealing between the adapter and the container when the adapter is mounted on the container.