Cell Culture Flask

FIG. 1 is a front, right-side, and top perspective view of a cell culture flask showing our new design; FIG. 2 is a front elevational view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a left side elevational view thereof; FIG. 5 is a right side view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof; FIG. 8 is a cross-section view thereof taken in the direction of line 8 in FIG. 2 ; FIG. 9 is a cross-section view thereof taken in the direction of line 9 in FIG. 2 ; and, FIG. 10 is a rear, left-side and bottom perspective view thereof. The dot-dash broken lines in FIG. 2 show the cross-sectional lines for FIGS. 8 and 9 and form no part of the claimed design.