The ornamental design for a heart-shaped massage therapy suction cup, as shown and described.
FIG. 1 is a top front perspective view of a heart-shaped massage therapy suction cup.
FIG. 2 is a bottom rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view, the right side view is the same thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
Petitioner's massage therapy suction cup is characterized by the heart-shape of the borders of the suction cup area as applied to the skin of the massage therapy patient which leave behind a heart-shaped design on the skin of the patient following the therapy.