The ornamental design for a cap for packagingcontainer, as shown and described.
FIG. 1 is a perspective view of a cap for packaging container, showing my 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 bottom plan view thereof.
FIG. 6 is a right side view thereof; and,
FIG. 7 is a sectional view taken along line 7-7 of FIG. 2 thereof.
In the drawings, the evenly spaced broken lines are shown for the purpose of illustrating parts of the article that form no part of the claim. The dot-dash lines represent the boundaries of the claim and form no part thereof.