What Does a 5th of Vodka Mean?
                                
                                
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                                    3 min read                                
                            
                                While the term 'fifth' is a vestige of the past, a 5th of vodka today refers to a standard 750-milliliter bottle. This is the most common size for distilled spirits in the United States, a measurement that was cemented into law in the late 1970s. The name originated from a time when liquor was measured in gallons, with one-fifth of a gallon being the standard commercial size.