The ornamental design for a cosmeticcase, as shown and described.
FIG. 1 is a top, front and right side perspective view of my new design;
FIG. 2 is a bottom, rear and right side perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a right side elevational view thereof, with the left side elevational view being a mirror image;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a bottom view thereof.
The dotted lines in FIG. 1 and FIG. 3, which include a representation of cosmetic sections, are included for the purpose of illustrating environmental structure and form no part of the claimed design.