Self-cleaning case for powder cosmetic product

A case for powder cosmetic product comprising:

• a base comprising a cavity for receiving said product, the cavity opening out axially through an opening;
• a sifter arranged in the opening;
• a closing cover configured to be screwed onto the base between a fully unscrewed position and a fully screwed position in which it is axially brought closer to the opening to allow its sealed closure;
• and
• a seal attached to the cover by an upper end which comprises:
• a lateral section elastically deformable in an axial direction;
• a membrane which is attached to a lower end of the deformable section and which comprises a contact face intended to rest on an entire surface of the sifter;
• and
• a chamber delimited between the cover and the membrane, wherein the contact face of the membrane is elastically deformable in flexion so that the contact face conforms to a shape of the sifter when the cover is screwed on, the contact face having relief elements, wherein the relief elements include protruding elements having complementary arrangement with sifter openings of the sifter such that the protruding elements rub against the sifter during rotation of the cover.