The ornamental design for a packagingcontainer, as shown and described.
FIG. 1 is a front, top and right side perspective view of a first embodiment of a packaging container showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a front, top and right side perspective view of a second embodiment of a packaging container showing our new design;
FIG. 8 is a front view thereof;
FIG. 9 is a rear view thereof;
FIG. 10 is a top plan view thereof;
FIG. 11 is a right side view thereof; and,
FIG. 12 is a left side view thereof.
The bottom plan view of the packaging container is omitted since it is unornamented and forms no part of the claimed design. The broken lines illustrate portions of the packing container that form no part of the claimed design.