I claim the ornamental design for a container apparatus, as shown and described.
FIG. 1 is a front, top, and left side perspective view of the container apparatus, shown attached to a child shown in broken lines, in accordance with an embodiment of the present invention;
FIG. 2 is a front, top, and left side perspective view of the container apparatus of FIG. 1;
FIG. 3 is a front elevational view of the container apparatus of FIG. 1;
FIG. 4 is a rear elevational view of the container apparatus of FIG. 1;
FIG. 5 is a left side elevational view of the container apparatus of FIG. 1;
FIG. 6 is a right side elevational view of the container apparatus of FIG. 1;
FIG. 7 is a top plan view of the container apparatus of FIG. 1; and,
FIG. 8 is a bottom plan view of the container apparatus of FIG. 1.
The child shown in FIG. 1 is shown in broken lines for illustrative purposes only and forms no part of the claimed design.