The ornamental design for a bottlecap, as shown and described.
FIG. 1 is an illustration of a top perspective view of the bottle cap showing our new design.
FIG. 2 is an illustration of a bottom perspective view thereof.
FIG. 3 is an illustration of a top elevational view thereof.
FIG. 4 is an illustration of a side elevational view thereof.
FIG. 5 is an illustration of a bottom elevational view thereof; and,
FIG. 6 is an illustration of a side elevational view of the bottle cap engaged with a bottle and shows a straw inserted through the bottle cap.
The broken lines showing the water bottle, straw, and scored portions of the bottle cap are for the purpose of illustrating environmental structure and unclaimed subject matter and form no part of the claimed design.