The ornamental design for a packagingcontainer, as shown and described.
FIG. 1 is an upper perspective view of the packaging container of the design;
FIG. 2 is a bottom view of the packaging container;
FIG. 3 is a top view of the packaging container;
FIG. 4 is a front elevational view of the packaging container;
FIG. 5 is a rear elevational view of the packaging container;
FIG. 6 is a left side view of the packaging container; and,
FIG. 7 is a right side view of the packaging container.
The broken line between two storage zones of the packaging container in each of FIGS. 1-3 represents a line of perforation or weakness for use in selectively splitting the two storage zones and forms no part of the claimed design.