FIG. 1 is a front perspective view of a flask, showing my new design;
FIG. 2 is a top perspective view thereof;
FIG. 3 is a front view thereof, the rear view being a mirror image thereof;
FIG. 4 is a left side view thereof, the right side view being a mirror image;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom view of the flask.