The ornamental design for a wall-mounted water bottle filling station, as shown and described.
FIG. 1 is a top-left quartering perspective view of wall-mounted water bottle filling station showing our new design;
FIG. 2 is bottom-right perspective thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a cross-sectional view thereof, generally taken along line 8-8 in FIG. 3.
Broken lines in the figures are for illustrative purposes only and are not part of the claimed design. Shade lines having a combination of long and short lines in the figures show contour and not surface ornamentation.