The ornamental design for a teabag, as shown and described.
FIG. 1 is a top plan view of a tea bag embodying our new design; and
FIG. 2 is a front elevational view thereof.
The bottom plan view is not shown and is essentially identical to the top
plan view of FIG. 1. The right side, left side and rear elevational views
are not shown and are essentially identical to the front elevational view
of FIG. 2.