Cap for a bottle

FIG. 1 is an upper perspective view of a cap for a bottle showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a lower perspective view thereof.

The broken lines depict portions of the cap for a bottle that form no part of the claimed design. The dot-dash-dot lines in FIGS. 7 and 8 depict the boundaries of the claim and form no part thereof.