Drinking flask

FIG. 1 is a front elevation view of a drinking flask showing my new design; the rear being a mirror image thereof;

FIG. 2 is a left side elevation view of the drinking flask of FIG. 1 ; the right side being a mirror image thereof;

FIG. 3 is a top view of the drinking flask of FIG. 1 ;

FIG. 4 is a bottom view of the drinking flask of FIG. 1 ; and,

FIG. 5 is a top perspective view of the drinking flask of FIG. 1 .