We claim the ornamental design for a metal container, as shown and described.
FIG. 1 is a perspective view of a metal container showing our new design;
FIG. 2 is a front view of the claimed design of FIG. 1;
FIG. 3 is a left side view of the claimed design of FIG. 1;
FIG. 4 is a right side view of the claimed design of FIG. 1;
FIG. 5 is a rear view of the claimed design of FIG. 1;
FIG. 6 is a top plan view of the claimed design of FIG. 1; and,
FIG. 7 is a bottom plan view of the claimed design of FIG. 1.
The ornamental design which is claimed is shown in solid lines in the drawings. The dot-dash lines define boundaries of the claimed design and form no part thereof. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.