The ornamental design for a container, as shown and described.
FIG. 1 is a perspective view of the container showing my design.
FIG. 2 is a front view thereof, a rear view being identical;
FIG. 3 is a top view thereof;
FIG. 4 is a side view thereof, an opposite side view being identical;
FIG. 5 is a bottom view thereof; and,
FIG. 6 is an exploded view showing a candy box element of the container removed from the interior of the container.
The sides of the candy box element not shown are identical to the sides shown in FIG. 6.
The dash-dash broken lines illustrate portions of the container. The dash-dot broken lines represent the bounds of the claim. The broken lines form no part of the claimed design.