The ornamental design for a containerbracket, as shown and described.
FIG. 1 is a top, left, back perspective view of a container bracket in accordance with our new design, shown in a state of use;
FIG. 2 is a top, left, back perspective view thereof, shown in a state of use;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a front view thereof; and,
FIG. 8 is a back view thereof.
The broken lines illustrating pipes, attachment points, and a container in FIGS. 1 and 2 show environmental structure that forms no part of the claimed design. The broken lines illustrating openings in the surface of the container bracket show portions of the bracket that form no part of the claimed design.