The ornamental design for a decorativestemwareglass, as shown and described.
FIG. 1 is a side isometric view of a decorative stemware glass;
FIG. 2 is a side isometric view of a decorative stemware glass, shown in an alternate environment of use with a bracelet configured thereon;
FIG. 3 is a front isometric view of a decorative stemware glass;
FIG. 4 is a front isometric view of a decorative stemware glass shown in an alternate environment of use with a bracelet configured thereon;
FIG. 5 is a back isometric view of a decorative stemware glass; and,
FIG. 6 is a back isometric view of a decorative stemware glass shown in an alternate environment of use with a bracelet configured thereon.
The decorative stemware glass comprises two raised ridges around the goblet portion of the glass, wherein the raised portions encircle the glass at an angle to the top of the glass as shown. In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.