The ornamental design for a bottleopener, as shown and described.
FIG. 1 is a top, front, left perspective view of a bottle opener showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The long and short broken lines in FIGS. 1, 2 and 6 that define the bounds of the claimed design form no part thereof.
The indicia in evenly spaced broken lines in the drawings in FIGS. 1, 2, and 6 is shown for environmental purposes only and forms no part of the claimed design.