I claim the ornamental design for a nasal wash bottle, as shown and described.
FIG. 1 is a front right top perspective view of the nasal wash bottle;
FIG. 2 is a rear right bottom perspective view of the nasal wash bottle;
FIG. 3 is a front view of the nasal wash bottle;
FIG. 4 is a rear view of the nasal wash bottle;
FIG. 5 is a left side view of the nasal wash bottle;
FIG. 6 is a right side view of the nasal wash bottle, which is a mirror image or the left side of the nasal wash bottle;
FIG. 7 is a top view of the nasal wash bottle; and,
FIG. 8 is a bottom view of the nasal wash bottle.
The broken lines in the Figures depict portions of the nasal wash bottle that form no part of the claimed design. The unshaded surfaces bounded by broken lines form no part of the claimed design.