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 plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation 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 portions of the bottle cap. None of the broken lines form part of the claimed design.