Why Are Most Whisky Bottles 700 Milliliters?

As we all know, the standard capacity of a wine bottle is 750ml. So whether it's a Burgundy bottle, a Bordeaux bottle or a Moselle bottle, the volume is the same despite the shape.
We are used to 750ml wine bottles. However, whisky glass bottles are usually 700ml, so how can this be?
(1) Why is wine 750ml?
Although glass blowing has been around since ancient Rome, because glass bottles were expensive, most alcoholic beverages, including whiskey and wine, were stored in terracotta jars. Until the popularization of cork technology in the 18th century, wine led the trend of glass bottles. At the time, however, most wine bottles had a capacity of 600-800ml, which was the approximate capacity that workers could blow in one breath. The birth of the wine standard bottle is mainly because a barrel (Bordeaux oak barrel 225L) of wine can just be packed into 750ml * 300 bottles, 12 bottles per box, just 25 boxes.
(2) Whisky changed from 750ml to 700ml
After the end of World War II, large-scale standardized production became the choice of many businesses. As a result, many wines have followed the example of wine, with 750ml as the universal bottle capacity, which is just one-fifth of the imperial gallon. Nowadays, we sometimes hear the words "A Fifth of Whisky", "A Fifth of Rum", "A Fifth of Vodka", which means a 750ml bottle of whisky, rum and vodka.
By 1970, the United Kingdom, the European Union, and Canada had implemented a 750ml standard wine bottle. But the United States is very maverick ah, sticking to the 757ml bottle, until 1979 to change to 750ml. Therefore, you will find that the vast majority of whisky produced in the 1970s and 1980s has a capacity of 750ml.
Why did the whisky go from 750ml to 700ml? The reason is simple -- to raise prices. Under the premise of the same price, the volume is reduced, which means that the price per unit volume of wine is also increased (this is normal business practice, and we can not blame it).
In 1993, the European Union introduced a regulation to set 700ml as the standard capacity (the number of bottles is up to the winery, you can use the standard capacity, or you can choose other capacity. But the choice of standard capacity to bottle must be more, because the mass production of standard bottles, the cost is lower), so most of the world's whiskey bottles are 700ml.
However, the United States is still very maverick, has always insisted on the use of 750ml bottles, so the United States whiskey bottle standard capacity is 750ml.
(3) Why 700ml?
Why 700ml and not 650ml or 600ml?
According to Johannes van den Heuvel, a leading international whisky player and one of the founders of Malt Maniacs: The Barrel used to age whiskey (mainly Scotch whiskey) is usually a 200L Bourbon Barrel, and after 12 years, only 175L of the liquor is left in the barrel due to evaporation (although Scotch whiskey is only required to be aged in the barrel for three years, But many high-quality Scotch whiskies are often aged for 12 years or more), and the alcohol content decreases from 63% ABV to 55-60% ABV. When bottled, the alcohol level is diluted to 40-43% ABV, which can be roughly filled into 700ml * 250 bottles. Typically, a barrel of whiskey aged to the end can produce 150-250 bottles of 700ml wine.