Cup holder

FIG. 1 is a perspective view from the front and top of an ornamental design for a cup holder.

FIG. 2 is a top plan view of FIG. 1 .

FIG. 3 is a bottom plan view of FIG. 1 .

FIG. 4 is a front elevational view of FIG. 1 .

FIG. 5 is a right side elevational view of FIG. 1 .

FIG. 6 is a rear elevational view of the embodiment of FIG. 1 ; and,

FIG. 7 is a left side elevational view of FIG. 1 .

The broken lines shown in FIGS. 1-7 that define unshaded regions represent the bounds of the claim, while all other broken lines are directed to environment and are for illustrative purposes only. The broken lines, and the surfaces of the cup holder that include and/or are defined by broken lines, form no part of the claimed design.