The ornamental design for a bottleopener, as shown and described.
FIG. 1 is a diagrammatic perspective view of the bottle opener in full
lines with a bottle shown in broken lines representing environmental
association matter being for illustrative purposes only and forming no
part of the claimed invention;
FIG. 2 is a right side elevational view thereof, the left side view being a
mirror image of the right side view;
FIG. 3 is a top plan view of the bottle opener, the bottom plan view being
a mirror image of the top view;