A “fifth” historically referred to a bottle size of one-fifth of a US gallon, equivalent to 757 milliliters (ml). While this term is still commonly used, Jack Daniel’s, like many other distillers, now primarily bottles its whiskey in 750 ml bottles. This size is close to the traditional fifth and has become a standard volume for liquor sales worldwide. A typical bottle of this size contains approximately 25.4 ounces.
The standardization of liquor bottle sizes provides consistency for consumers and facilitates international trade. The 750 ml bottle size offers a practical volume for both individual consumption and sharing, contributing to its widespread adoption. Understanding this measurement allows consumers to compare prices and quantities effectively across different brands and regions. Historically, the fifth was a standard unit of measurement in the US spirits market. Although metric units are now prevalent, the legacy of the “fifth” remains in colloquial language.