A packaging device for at least one cosmetic product, comprises a case defining a housing. The case has a first snap-fit relief and a cover adapted to be fixed on the case to close the housing. The cover has a second snap-fit relief, adapted to cooperate with the first snap-fit relief to fix the cover on the case. One of the first snap-fit relief and the second snap-fit relief is made of metal and comprises at least one snap-fit tab extending between at least two slits.