The ornamental design for a christmastreewateringdevice, as shown and described.
FIG. 1 is a perspective view of the Christmas tree watering device, showing the new design;
FIG. 2 is a front elevational view of the Christmas tree watering device thereof;
FIG. 3 is a bottom plan view of the Christmas tree watering device thereof;
FIG. 4 is a top plan view of the Christmas tree watering device thereof; and,
FIG. 5 is an environmental view of the Christmas tree watering device thereof.
The rear elevational view of the Christmas tree watering device is a mirror image of the front elevational view of the Christmas tree watering device shown in FIG. 2.
The right side elevational view of the Christmas tree watering device is a mirror image of the front elevational view of the Christmas tree watering device shown in FIG. 2.
The broken lines depict portions of the Christmas tree watering device that form no part of the claim design.