Cosmetic unit comprising two coupled partial units

1. A cosmetic unit comprising:

two partial units, each of which having a receptacle for receiving a cosmetic substance and a closure cap by which the receptacle is closable,

a coupling member that engages with the two closure caps, whereby the two partial units are interconnectable, and

a cap recess defined in each closure cap, extending in a direction of a central axis, on an axial front end that faces away from the receptacle of the corresponding partial unit,

wherein the coupling member comprises a central portion with two axial coupling projections being formed thereon, wherein each coupling projection engages with one of the two cap recesses when in an assembled state, and wherein a longitudinal hollow space that extends in an axial direction is provided in the two axial coupling projections of the coupling member.

2. A cosmetic unit according to claim 1 , wherein a transverse hollow space that extends perpendicularly to the axial direction is provided in the two axial coupling projections of the coupling member.

3. A cosmetic unit according to claim 2 , wherein an internal wall of the cap recesses is provided with a locking protrusion which engages with the transverse hollow space when in the assembled state.

4. A cosmetic unit according to claim 1 , wherein an adhesive bond is provided between the two axial coupling projections and the closure cap.

5. A cosmetic unit according to claim 1 , wherein the two axial coupling projections are disposed within the cap recess by a press-fit when in the assembled state.

6. A cosmetic unit according to claim 1 , wherein a cross-section of the two axial coupling projections has one of the following shapes:

angled;

rounded;

oval;

round.

7. A cosmetic unit according to claim 1 , wherein a cross-section of the coupling member in transition areas from the central portion to one of the respective coupling projections has one of the following shapes:

angled;

rounded;

oval.

8. A cosmetic unit according to claim 7 , wherein an area of cross-sectional surfaces in the transition areas steadily decreases from the central portion, and wherein an outer contour, which extends in the direction of the central axis, advantageously has a curved shape.

9. A cosmetic unit according to claim 8 , wherein the curved shape of the outer contour, which extends in the direction of the central axis, is defined by a longitudinal radius.

10. A cosmetic unit according to claim 1 , wherein each of the coupling projections has at least one transverse slot at the free end thereof that extends perpendicularly to the axial direction and over the entire transverse dimension.

11. A cosmetic unit according to claim 10 , wherein each of the coupling projections has at least two webs at the free end thereof which are separated by the transverse slot, and wherein a locking protrusion is provided on the outside of at least one web.

12. A cosmetic unit according to claim 1 , wherein the central portion has two axial front ends and one outer circumferential surface, and wherein one circumferential rounded edge each is provided between each of the front ends and the outer circumferential surface.

13. A cosmetic unit according to claim 1 , wherein the central portion has two axial front ends and one outer circumferential surface, and wherein one circumferential edge each is provided between each of the front ends and the outer circumferential surface, said circumferential edge being provided with an axially protruding edge projection.