The ornamental design for a tubetag, as shown and described.
FIG. 1 is a top, front, left side perspective view of a tube tag; the top, right side perspective view being a mirror image thereof, therefore not shown;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a bottom, rear, right side perspective view thereof; the bottom, rear, left sider perspective view being a mirror image thereof, therefore not shown.
The shade lines in the Figures show contour and do not claim surface ornamentation or treatment.