A method of dispensing an amount of liquid from a bottle (502-508, 902, 5104), comprising: mounting a dispensing head (4502, 4800, 5002, 5102, 5302, 5602) on the bottle (502-508, 902, 5104), said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) having a pour spout (4506, 4804, 5108), a valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110), and a gas intake (4806, 5106), wherein said pour spout (4506, 4804, 5108) faces outward from said dispensing head (4502, 4800, 5002, 5102, 5302, 5602); moving said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) into contact with a dispensing system (500, 6602) such that the gas intake (4806, 5106) on said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) is in fluid communication with a gas line on said dispensing system (500, 6602) and such that the valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110) of said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) is engaged with a motor (6606, 6706) of the dispensing system (500, 6602); receiving, at said dispensing system (500, 6602), information relating to the amount of liquid to be dispensed; rotating said valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110) of said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) by said motor (6606, 6706) such that said valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110) selectively allows flow from an inert gas source through said gas intake (4806, 5106) allowing inert gas flow into said bottle (502-508, 902, 5104) such that liquid in said bottle (502-508, 902, 5104) is forced into said pour spout (4506, 4804, 5108) or allows inert gas flow from said gas intake (4806, 5106) and out said pour spout (4506, 4804, 5108) to provide a puff purge of said pour spout (4806, 5106) or allows an initial air purge of the initial air that is present in a bottle when it is first opened; starting an injection of an inert gas into the bottle (502-508, 902, 5104) having the liquid; stopping said injection when said amount of liquid to be dispensed has exited said bottle (502-508, 902, 5104) through the pour spout (4506, 4804, 5108); and removing the bottle (502-508, 902, 5104) from the dispensing system (500, 6602), wherein said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) is retained on the bottle (502-508, 902, 5104) and prevents air from entering the bottle (502-508, 902,5104). mounting a dispensing head (4502, 4800, 5002, 5102, 5302, 5602) on the bottle (502-508, 902, 5104), said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) having a pour spout (4506, 4804, 5108), a valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110), and a gas intake (4806, 5106), wherein said pour spout (4506, 4804, 5108) faces outward from said dispensing head (4502, 4800, 5002, 5102, 5302, 5602); moving said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) into contact with a dispensing system (500, 6602) such that the gas intake (4806, 5106) on said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) is in fluid communication with a gas line on said dispensing system (500, 6602) and such that the valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110) of said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) is engaged with a motor (6606, 6706) of the dispensing system (500, 6602); receiving, at said dispensing system (500, 6602), information relating to the amount of liquid to be dispensed; rotating said valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110) of said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) by said motor (6606, 6706) such that said valve assembly (4810, 5208, 5304, 5404, 5508, 6010, 6110) selectively allows flow from an inert gas source through said gas intake (4806, 5106) allowing inert gas flow into said bottle (502-508, 902, 5104) such that liquid in said bottle (502-508, 902, 5104) is forced into said pour spout (4506, 4804, 5108) or allows inert gas flow from said gas intake (4806, 5106) and out said pour spout (4506, 4804, 5108) to provide a puff purge of said pour spout (4806, 5106) or allows an initial air purge of the initial air that is present in a bottle when it is first opened; starting an injection of an inert gas into the bottle (502-508, 902, 5104) having the liquid; stopping said injection when said amount of liquid to be dispensed has exited said bottle (502-508, 902, 5104) through the pour spout (4506, 4804, 5108); and removing the bottle (502-508, 902, 5104) from the dispensing system (500, 6602), wherein said dispensing head (4502, 4800, 5002, 5102, 5302, 5602) is retained on the bottle (502-508, 902, 5104) and prevents air from entering the bottle (502-508, 902,5104).