I'm the United state, a common quantity of hard liquor was historically a fifth, which represent a fifth of a US gallon.However because the US wants to market its alcohol globally and everyone else uses the metric system, it has retooled his packaging, so a common quantity now is 750 mL. How many liters are in a fifth? How many milliliters are in a fifth? Which is larger 750 mL or a fifth of a gallon