The ornamental design for a dual chamberbottle, as shown and described.
FIG. 1 is a top perspective view of the dual chamber bottle with a shrink sleeve provided thereover.
FIG. 2 is a first side view of the dual chamber bottle with a shrink sleeve shown in FIG. 1.
FIG. 3 is a second, opposite side view of the dual chamber bottle with a shrink sleeve shown in FIG. 1.
FIG. 4 is a front view of the dual chamber bottle with a shrink sleeve shown in FIG. 1.
FIG. 5 is a rear view of the dual chamber bottle with a shrink sleeve shown in FIG. 1.
FIG. 6 is a top plan view of the dual chamber bottle with a shrink sleeve shown in FIG. 1; and,
FIG. 7 is a bottom plan view of the dual chamber bottle with a shrink sleeve shown in FIG. 1.
The dash-dash broken lines shown at the top of the bottle in FIGS. 1-6 illustrate portions of the dual chamber bottle, and form no part of the claimed design. The intermittent broken lines shown on the shrink sleeve of the dual chamber bottle are contour lines.