The ornamental design for a containmentbag, as shown and described.
FIG. 1 is an isometric perspective view of a containment bag, shown in a position of use, having an attached and unclaimed mesh top drawn in broken lines;
FIG. 2 is a front elevation view of the containment bag shown in FIG. 1;
FIG. 3 is a back elevation view of the containment bag shown in FIG. 1;
FIG. 4 is a right side elevation view of the containment bag shown in FIG. 1;
FIG. 5 is a left side elevation view of the containment bag shown in FIG. 1;
FIG. 6 is a top plan view of the containment bag shown in FIG. 1, shown with the attached and unclaimed mesh top drawn in broken lines; and,
FIG. 7 is a bottom plan view of the containment bag shown in FIG. 1.
The broken lines showing the mesh top in FIG. 1 and FIG. 6 depict environment and form no part of the claimed design. All other broken lines depict portions of the containment bag that form no part of the claimed design.