Device for packaging two products separately

Device for packaging two products separately and dispensing a resulting mixture on a first use, said device comprising a lower container delimiting a first product cavity containing a first product and an upper container comprising a dispensing chimney delimiting a second product cavity containing a second product and having a dispensing orifice, said upper container comprising an assembly skirt surrounding the dispensing chimney and snap-fitted on the lower container, such that the upper container is held axially relative to the lower container, while allowing a rotating movement one relative to the other, said containers being capable of rotating one relative to the other without moving axially, wherein said device further comprises a temporary closing member configured to close an opened end of the upper container before the first use, and comprising a cylindrical skirt surrounding said opened end and a plug connected to said cylindrical skirt, said cylindrical skirt being provided, on its inner cylindrical surface, with inner threads cooperating with outer threads provided on the dispensing chimney of the upper container and on its outer cylindrical surface, with first anti-rotation means cooperating with second anti-rotation means provided on the lower container for preventing rotation between the closing member and the lower container, wherein the closing member is deprived from any axially retaining members with both containers, such that when the upper container is rotated in a first rotation direction, the closing member translates downwardly until falling into the first product cavity.