A bottle coupling device for connecting a first bottle to a second bottle is provided. The first bottle has a first threaded opening and the second bottle has a second threaded opening. The first bottle holds a first substance and the second bottle holds a second substance. The bottle coupling device comprises a hollow female coupling having an outer surface and an inner surface with a first end and a second end. The inner surface of the first end and the second end are threaded. The first opening of the first bottle is threadably connectable to the first end of the female coupling and the second opening of the second bottle is threadably connectable to the second end of the female coupling. Wherein the second substance is transferrable to the first bottle through the female coupling.