The ornamental design for a bathtubsticker, as shown and described.
FIG. 1 is a perspective view of a bathtub sticker;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a partial enlarged view of the area labeled “8” in FIG. 1 thereof;
FIG. 9 is a partial enlarged view of the area labeled “9” in FIG. 2 thereof; and,
FIG. 10 is a partial enlarged view of the area labeled “10” in FIG. 4 thereof.
The dash dot dash lines in FIGS. 1, 2, 4, 8, 9 and 10 are for the purpose of depicting the boundary lines of the enlarged view and form no part of the claimed design.