The ornamental design for a vase, as shown and described.
FIG. 1 is a front view of my new and ornamental design for a vase, shown
with the ribs extended it being understood that the rear view is a mirror
image thereof; and,
FIG. 2 is a front view of my new and ornamental design for a vase, shown
with the ribs pushed in it being understood that the rear view is a mirror
image thereof.