Bottle cap

FIG. 1 is a top perspective view of a bottle cap showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a right side elevation view thereof.

The undisclosed rear view is symmetrical to the front view and the undisclosed left view is symmetrical to the right side view. The broken lines are shown for the purpose of illustrating environmental subject matter of an exemplary bottle and form no part of the claimed design.