FIG. 1 is a front isometric view of a first embodiment of a cap for a bottle, showing my design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a front isometric view of a second embodiment of a cap for a bottle, the only difference being that the cap for a bottle is transparent;
FIG. 8 is a front view thereof;
FIG. 9 is a rear view thereof;
FIG. 10 is a left side view thereof;
FIG. 11 is a right side view thereof; and,
FIG. 12 is a top view thereof.
Portions of the cap for a bottle that are not shown in the drawings form no part of the claimed design.
The broken line showing of a bottle is for the purposes of illustrating environmental structure and forms no part of the claimed design.