The ornamental design for a utilitytub, as shown and described.
FIG. 1 is a perspective view of a utility tub in accordance with a preferred embodiment of our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof, with the left side elevational view being a mirror image thereof;
FIG. 4 is a rear elevational view thereof; and,
FIG. 5 is a top plan view thereof.
The broken lines in the figures are for illustrative purposes only and form no part of the claimed design.
The bottom plan view of the utility tub is not shown in the drawings or described in the specification and, therefore, forms no part of the claimed design.