Abstract: The invention relates to a cosmetic assembly comprising: (A) a cosmetic or dermatological composition contained inside a reservoir, said composition being liquid and comprising, in a physiologically acceptable medium: (i) from 1 to 90% by weight of a fragrance concentrate; (ii) from 1 to 98.5% by weight of at least one non-volatile solvent for said concentrate having a density of less than 1; (iii) at least from 0.5% to 50% by weight of at least one volatile alcohol for said concentrate; said composition having a viscosity less than or equal to 8 mPa·s; the amounts being defined relative to the total weight of the composition; (B) a spraying device comprising a container containing said liquid cosmetic composition, equipped with a piezoelectric spraying mechanism that makes it possible to spray the cosmetic composition in the form of droplets.