I claim the ornamental design for a cookware device, substantially as shown and described.
FIG. 1 is a top, perspective view of the cookware device; the view showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is a side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a bottom, perspective thereof.
A cookware device, the broken lines showing portions of the design in the figures are included for the purpose of illustrating environment and unclaimed features and forms not part of the claimed design.