The ornamental design for a towelclip, as shown and described.
FIG. 1 is a perspective view of the towel clip;
FIG. 2 is front view of the towel clip;
FIG. 3 is a back view of the towel clip;
FIG. 4 is a left side view of the towel clip, where the right side is a mirror image of the left side;
FIG. 5 is top view of the towel clip, where the bottom view is a mirror image of the top view;
FIG. 6 is a front perspective view of the towel clip in place on a towel;
FIG. 7 is a back perspective view of the towel clip in place on a towel
FIG. 8 is a front perspective view of the towel clip with a decorative component;
FIG. 9 is a back perspective view of the towel clip with a decorative component, where the decorative component is attached to the towel clip via a hook; and,
FIG. 10 is a back perspective view of the towel clip with a decorative component, where the decorative component is attached to the towel clip via a bracket.
The towel, decorative component, hook, and bracket shown in dashed lines are shown for illustrative purposes only and form no part of the claimed design. The towel clip is shown with a separation to indicate that no specific length other than what is shown is claimed.