The ornamental design for a tray for supporting thereon in upright positions a plurality of wine glasses, as shown.
FIG. 1 is a plan view of the tray for supporting thereon in upright positions a plurality of wine glasses showing my new design;
FIG. 2 is a side elevational view of the tray as seen when viewing the right side of the tray as shown in FIG. 1;
FIG. 3 is a side elevational view of the tray as seen when looking or observing the left side of the tray as shown in FIG. 1;
FIG. 4 is a end elevational view of the tray; and,
FIG. 5 is an end elevational view similar to FIG. 4 but illustrating also in phantom by broken lines a person's hand as it would appear when employed to support the tray with one or more such wine glasses mounted therein, which wine glasses are shown in phantom by broken lines in FIG. 5.