The ornamental design for the cup holder, as shown and described.
FIG. 1 is a top, rear, right side perspective view of a cup holder showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a left side elevation view thereof;
FIG. 7 is a right side elevation view thereof; and,
FIG. 8 is a top, rear, right side, exploded perspective view thereof.
The break shown in the vertical support portion of the cup holder is to indicate indeterminate length. The examiner finds the claim to be definite under 35 USC 112 second paragraph with the understanding that the “indeterminate” portion of the article forms no part of the claim design. Patentability is based only on those portions of the article that are shown in solid lines.