FIG. 1 is a perspective view showing the new design for a water filtration device. FIG. 2 is a front view thereof; FIG. 3 is a back view thereof; FIG. 4 is a left side view thereof, the right side view being a mirror image of the left side view shown; FIG. 5 is a top view thereof; FIG. 6 is a bottom view thereof; and, FIG. 7 is a perspective view showing the design with the bottles removed.