Vacuum flask

Description

FIG. 1 is a front perspective view of our new design;

FIG. 2 is a back perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a right side view thereof, the left side view being a mirror image thereof.

Claims

The ornamental design for a vacuum flask as shown.