The ornamental design for a bottleopener, as shown and described.
FIG. 1 is a front elevation view of a bottle opener showing our new design;
FIG. 2 is a rear elevation view of the bottle opener of FIG. 1;
FIG. 3 is a left side elevation view of the bottle opener of FIG. 1;
FIG. 4 is a right side elevation view of the bottle opener of FIG. 1;
FIG. 5 is a top view of the bottle opener of FIG. 1;
FIG. 6 is a bottom view of the bottle opener of FIG. 1; and,
FIG. 7 is a top perspective view of the bottle opener of FIG. 1.
The broken lines showing in the drawings is included for the purpose of illustrating unclaimed portions of the bottle opener and and form no part of the claimed design.