Sidewall for a bottle

FIG. 1 is a front and right side perspective view of a sidewall for a bottle showing our new design;

FIG. 2 is a right side elevation thereof, the rear elevation is the same;

FIG. 3 is a left side view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines shown in FIGS. 1 through 5 are for illustrative purposes only and do not form part of the claimed design.