Case

The design is the features of shape, configuration and ornament of the portions of a case for a vaporizer device as shown in solid lines in the drawings. The portions shown in stippled lines do not form part of the design. Drawings of the design are included. FIG. 1 is a front, right side, and bottom perspective view of a case for a vaporizer device showing a first variant of the design; FIG. 2 is a front, right side, and top perspective view thereof; FIG. 3 is a front view thereof; FIG. 4 is a rear view thereof; FIG. 5 is a right side view thereof; FIG. 6 is a left side view thereof; FIG. 7 is a top view thereof; FIG. 8 is a bottom view thereof; FIG. 9 is a cross-sectional view thereof, taken along the line 9-9 as shown in FIG. 3; FIG. 10 is a front, right side, and bottom perspective view of a case for a vaporizer device showing a second variant of the design; FIG. 11 is a front, right side, and top perspective view thereof; FIG. 12 is a front view thereof; FIG. 13 is a rear view thereof; FIG. 14 is a right side view thereof; FIG. 15 is a left side view thereof; FIG. 16 is a top view thereof; and FIG. 17 is a bottom view thereof.