The ornamental design for a travelpillow, as shown and described.
FIG. 1 is a front perspective view of the travel pillow;
FIG. 2 is a front view of the travel pillow;
FIG. 3 is a rear view of the travel pillow;
FIG. 4 is a top view of the travel pillow;
FIG. 5 is a first side view of the travel pillow;
FIG. 6 is a side view of the travel pillow;
FIG. 7 is a rear perspective view of the travel pillow; and,
FIG. 8 is a bottom view of the travel pillow shown in FIG. 1.
The dashed or broken lines in the FIGS. 3 and 7 illustrate a zipper, a commonly used device for binding the edges of an opening of the travel pillow fabric material, and form no part of the claimed design.