Volumetric flask

FIG. 1 is a perspective view of a volumetric flask showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

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

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawing views represent environmental structure of the volumetric flask and form no part of the claimed design.