Refill and pot for packaging a cosmetic product comprising such a refill

A refill for a pot for packaging a cosmetic product, extending along a central axis X, capable of receiving the cosmetic product, and comprising a rigid body defined by a peripheral wall having an open upper end surrounded by a collar extending outwards, and a lower end closed by a bottom wall, wherein the refill comprises wedging means for wedging in the pot, which means are deformable and define, with an outer surface of the peripheral wall, at least one cavity of variable volume as a function of the wedging,

• wherein said wedging means comprises at least one external, flexible wedging wall arranged opposite and at least partially at a distance from the outer surface of the peripheral wall, said cavity being defined only between the wedging wall and the peripheral wall,
• wherein each wedging wall is curved and is mounted on the peripheral wall by interlocking of corresponding shapes,
• wherein the peripheral wall comprises a female form embodied in its outer surface, into which a male form provided for this purpose interlocks on the wedging wall, and
• wherein each wedging wall has an outwardly curved shape with a summit located at a distance from the peripheral wall, said male form projecting from a lower end of the wedging wall.