FIG. 1 is a right front perspective view of a combined lower portion of a cap and upper portion of a bottle and the resulting interface showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being identical; and,

FIG. 3 is a right side elevational view thereof, the left side being identical.

The top and bottom plan views are not shown because they are devoid of ornamentation.

The broken lines shown of the bottle and cap are for illustraive purposes only and form no part of the claimed design.