I claim the ornamental design for a spill tray, as shown and described.
FIG. 1 is a top elevational view of a spill tray showing our new design.
FIG. 2 is a side elevational view thereof, all side elevational views being
substantially identical thereto; and,
FIG. 3 is a cross-sectional view thereof, taken along the line 3--3 of FIG.
1.
The bottom surface of the spill tray forms no part of the claimed design.
The broken line disclosure of the U-shaped center cutout is for
illustrative purposes only and forms no part of the claimed design.