An ornamentaldesign for a bottle bottom, as shown and described.
FIG. 1 is a front elevation view of a bottle bottom in accordance with the present invention;
FIG. 2 is a right side elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a bottom perspective view thereof;
FIG. 7 is a section view taken along the lines 7-7 in FIG. 1; and,
FIG. 8 is an enlarged detail of the area shown in FIG. 3.
In the drawings, the evenly dashed broken lines showing the remainder of the bottle illustrate features which form no part of the claim. The dot-dash broken lines in FIGS. 3 and 8 define the area of the detailed view and the dot-dot-dash broken lines in FIGS. 1-4, 6, and 7 define the bounds of the claim; both of which form no part thereof.