>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 253⁄5 U.S. fluid

>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 253⁄5 U.S. fluid ounces (757 milliliters) So it's really not that bad /s