The ornamental design for a displaybottle, as shown and described.
FIG. 1 is a top and side perspective view of a display bottle showing my new design;
FIGS. 2, 3, 4 and 5 are side views at 90 degree offsets thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines immediately adjacent to the shaded areas represent the bounds of the claimed design while all other broken lines represent environment and are for illustrative purposes only; the broken lines form no part of the claimed design.