The ornamental design for a handle for barware, as shown and described.
FIG. 1 shows a perspective view of a handle for barware in an exemplary environment;
FIG. 2 shows a front view of a handle for barware;
FIG. 3 shows a top view thereof;
FIG. 4 shows a right-side view thereof;
FIG. 5 shows a left-side view thereof;
FIG. 6 shows a rear view thereof; and,
FIG. 7 shows a bottom view thereof.
The broken lines showing portions of the handle for barware are included for the purposes of illustrating the environmental structure and form no part of the claimed design.