I claim the ornamental design for a cosmetic container, as shown and described.
FIG. 1 is a front elevation view of the cosmetic container
FIG. 2 is a right side elevation view thereof.
FIG. 3 is a rear elevation view thereof.
FIG. 4 is a left side elevation view thereof.
FIG. 5 is a top view thereof.
FIG. 6 is a bottom view thereof.
FIG. 7 is a front perspective view thereof; and,
FIG. 8 is an exploded view thereof showing the cosmetic container.
The showing of a cosmetic in the cosmetic container is for illustrative purposes only to show environment with the shape of the cosmetic forming no part of the claimed design. No specific color is claimed.