The ornamental design for the container holder, as shown in solid lines in the associated figures and as described herein.
FIG. 1 illustrates a front perspective view of a container holder showing my new design;
FIG. 2 illustrates a front view of the container holder of FIG. 1;
FIG. 3 illustrates a rear view of the container holder of FIG. 1;
FIG. 4 illustrates a right side view of the container holder of FIG. 1;
FIG. 5 illustrates a left side view of the container holder of FIG. 1;
FIG. 6 illustrates a top view of the container holder of FIG. 1;
FIG. 7 illustrates a bottom view of the container holder of FIG. 1;
FIG. 8 illustrates a front perspective view of the container holder of FIG. 1 in an assembled configuration;
FIG. 9 illustrates a rear perspective view of the container holder of FIG. 1 in an assembled configuration; and,
FIG. 10 illustrates a perspective view of two container holder of FIG. 1 in an assembled and connected configuration.
The ornamental design of the container holder, which is claimed, is shown in solid lines in the drawings. Broken lines in the drawings depict portions of the container holder that form no part of the claimed design.