The ornamental design for a containment apparatus, as shown and described.
FIG. 1 is a front perspective view of a containment apparatus showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is an additional front perspective view thereof, showing additional environmental subject matter with which the claimed design may be used.
The broken line showing of portions of the containment apparatus in FIGS. 1-3, and 6-8 represents environmental subject matter and forms no part of the claimed design. The broken line showing of a high chair in FIG. 8 represents environmental subject matter and forms no part of the claimed design.