I claim, the ornamental design for a bottle brush, as shown and described.
FIG. 1 is a perspective view of a bottle brush showing my new design;
FIG. 2 is a side view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is an exploded perspective view thereof.
The broken lines shown on the body of the handle in the figures and on the front surface of the detached portion of the handle in FIG. 7 represent the bounds of the claim while the broken lines showing a brush head in FIG. 7 illustrate environmental structure of the bottle brush that along with the broken-line boundaries form no part of the claimed design.