I claim the ornamental design for a container cartridge, as shown and described.
FIG. 1 is a front perspective view of a container cartridge showing my new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The dashed lines are shown for the purpose of illustrating parts of the article as well as environmental subject matter of an exemplary container. None of the dashed lines form part of the claimed design. The dot-dash lines represent the boundaries of the claim and form no part thereof.