The ornamental design for a containerinsert, as shown and described.
FIG. 1 is a front, top perspective view of a container insert showing our new design;
FIG. 2 is a front elevational view of the container insert showing our new design;
FIG. 3 is a rear elevational view of the container insert showing our new design;
FIG. 4 is a right side view of the container insert showing our new design;
FIG. 5 is a left side view of the container insert showing our new design;
FIG. 6 is a top plan view of the container insert showing our new design;
FIG. 7 is a bottom plan view of the container insert showing our new design;
FIG. 8 is a front, bottom perspective view of the container insert showing our new design;
FIG. 9 is a front perspective environmental view of the container insert showing our new design; and,
FIG. 10 is an exploded front perspective environmental view of the container insert showing our new design.
The broken-lines shown in FIGS. 9 and 10 illustrate environmental structure. All other broken lines represent portions of the container insert. The broken lines form no part of the claimed design.