The ornamental design for a travelpillow, as shown and described.
FIG. 1 is a first side view of the travel pillow;
FIG. 2 is a second side view of the travel pillow;
FIG. 3 is a top plan view of the travel pillow;
FIG. 4 is a bottom plan view of the travel pillow;
FIG. 5 is a front view of the travel pillow;
FIG. 6 is a back view of the travel pillow;
FIG. 7 is a partial perspective view of the travel pillow including an embodiment of use. Any broken lines within this Figure showing the environment is for illustrative purposes only and forms no part of the claimed design;
FIG. 8 is a perspective view of the travel pillow in a flattened configuration; and,
FIG. 9 a top plan view of the travel pillow showing a first pocket closed configuration and a second pocket in an opened configuration.