The ornamental design for a bottle with eight paneloval shoulder, as shown and described.
FIG. 1 is a top, front perspective view of a bottle with eight panel oval shoulder, showing my design;
FIG. 2 is a front elevational view thereof, the rear, left side, and right side elevational views being identical;
FIG. 3 is a top plan view thereof; and,
FIG. 4 is a bottom plan view thereof.
The broken lines shown in the drawings on a portion of the bottom surface are included for the purpose of illustrating environmental structure that forms no part of the claimed design.