Fifth (unit)
Unit of volume used for wine and spirits / From Wikipedia, the free encyclopedia
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A fifth is a unit of volume formerly used for wine and distilled beverages in the United States, equal to one fifth of a US liquid gallon, or 25+3⁄5 U.S. fluid ounces (757 milliliters); it has been superseded by the metric bottle size of 750 mL,[1] sometimes called a metric fifth, which is the standard capacity of wine bottles worldwide and is approximately 1% smaller.