I claim the ornamental design for collapsible cup holder for a chair arm, as shown and described.
FIG. 1 is a perspective view of the collapsible cup holder for a chair arm wherein the cup holder is collapsed.
FIG. 2 is a top view of the collapsible cup holder for a chair arm wherein the cup holder is collapsed.
FIG. 3 is a front view of the collapsible cup holder for a chair arm wherein the cup holder is collapsed. The rear view being a mirror image of the front view.
FIG. 4 is a left side view of the collapsible cup holder for a chair arm wherein the cup holder is collapsed. The right side view being a mirror image of the left side view.
FIG. 5 is a bottom view of the collapsible cup holder for a chair arm wherein the cup holder is collapsed.
FIG. 6 is a perspective view of the collapsible cup holder for a chair arm wherein the cup holder is extended.
FIG. 7 is a top view of the collapsible cup holder for a chair arm wherein the cup holder is extended.
FIG. 8 is a front view of the collapsible cup holder for a chair arm wherein the cup holder is extended. The rear view being a mirror image of the front view.
FIG. 9 is a left side view of the collapsible cup holder for a chair arm wherein the cup holder is extended. The right side view being a mirror image of the left side view; and,
FIG. 10 is a bottom view of the collapsible cup holder for a chair arm wherein the cup holder is extended.