The ornamental design for a bottletop to bottombase, cap or threaded coupling, as shown and described.
FIG. 1 is a front elevational view of the bottle top to bottom base, cap or threading coupling shown inside a bottle, showing my new design, all sides being identical;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and,
FIG. 4 is a cross sectional elevational view thereof, taken along line 4—4 of FIG. 2.
The broken line showing of a bottle in Figure is included for the purpose of illustrating only and forms no part of the claimed design.