The ornamental design for a cosmeticcase, as shown and described.
FIG. 1 is a front, top, right side isometric view of a cosmetic case showing my new design;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
The broken lines illustrate portions of the cosmetic case which form no part of the claimed design. In FIG. 7, the two horizontal lines located on each side of the rear view, between the circular elements and the central hinge element, are flush with the surrounding surface.