The ornamental design of a shippingcontainer, as shown and described.
FIG. 1 is a top left side perspective view of a shipping container showing our new design;
FIG. 2 is a bottom right side perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top-plan view thereof;
FIG. 8 is a bottom-plan view thereof;
FIG. 9 is a top right side perspective view thereof; and,
FIG. 10 is a bottom left side perspective view thereof.
The broken lines in the drawings are intended to represent both parts of the article that form no part of the claim as well as boundaries of the claim.