The ornamental design for a bottleopener, as shown and described.
FIG. 1 is a top perspective view of the bottle opener.
FIG. 2 is a bottom perspective view of the bottle opener.
FIG. 3 is a right elevation view of the bottle opener.
FIG. 4 is a left elevation view of the bottle opener.
FIG. 5 is the front elevation view of the bottle opener.
FIG. 6 is a rear elevation view of the bottle opener.
FIG. 7 is a bottom plan view of the bottle opener; and,
FIG. 8 is a top plan view of the bottle opener.
The broken lines showing a lanyard element in FIGS. 1 and 2 illustrates environmental elements and forms no part of the claimed design. The broken lines showing a circular screw element in FIGS. 1-7 illustrate unclaimed portions of the bottle opener and forms no part of the claimed design.