The ornamental design for a travelpillow, as shown and described.
FIG. 1 is an isometric view of a travel pillow showing my new design from one perspective.
FIG. 2 is an isometric view thereof from another perspective.
FIG. 3 is a front elevational view thereof.
FIG. 4 is a rear elevational view thereof.
FIG. 5 is a left side elevational view thereof.
FIG. 6 is a right side elevational view thereof.
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
Stippling shown in the drawings is intended to represent the three-dimensional contour of the design, and is not intended to indicate surface decoration. The broken lines in the figures are for illustrative purposes only and form no part of the claimed design.