I claim, the ornamental design for a dressing bottle, as shown and described.
FIG. 1 is a front elevational view showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and,
FIG. 4 is a top, front and side perspective view thereof.
The broken lines showing in FIGS. 2, 3 and 4 are included for the purpose of illustrating portions of the dressing bottle that form no part of the claimed design.