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A pour is a pour is a pour, except when it’s not. When it comes to wine, each type of bottle and the different kinds of wine you’re pouring determine how many glasses of wine you’ll get from a single bottle. Most standard wine bottles contain 750 milliliters of wine, which breaks down to about five individual glasses (in case you need a head count for your next shindig). That’s about 150 milliliters of wine per glass.

However, depending on where you are in the world, the number of glasses changes depending on the alcohol content in the wine. In other words, even if the wine bottle contains 750 milliliters of the good stuff, you may not get five glasses of wine from the bottle. For example, a bottle of German riesling, with its 8% alcohol by volume (ABV), would come out to 4.7 glasses of wine instead of five glasses. This is because the wine’s alcohol content sometimes determines how much liquid is in the glass and, therefore, how many units of alcohol you’d be consuming per glass.

This way of ABV-content wine-pouring is usually geographically specific to certain parts of the world, like Australia. That said, you’d follow a similar rule when serving wines like a port. Bottles of port wine net 10 glasses because the alcohol content is higher than that of your standard wines, which means less port in the glass.

You may believe that the size of a glass affects how much wine is poured, but typically this isn’t true. There isn’t a bulk-sized option for serving wine, and a larger glass doesn’t equate to a larger serving. The customary serving size is five ounces, regardless of the glass’s volume, although Champagne is an exception.

Standard Champagne bottles are the same 750 milliliters as other wines, but Champagne flutes are slimmer and hold about four ounces due to the effervescence of the drink. This smaller serving size is particularly suited to toasts, during which people generally consume less Champagne compared to other occasions, like sipping wine at brunch. Consequently, you can expect to get approximately six-and-a-quarter flutes of Champagne from each bottle.

While using larger glasses doesn’t change the serving size of wine, the size of the bottle can influence how many servings it contains. For instance, a Piccolo or split bottle holds one glass, a demi contains two, a standard bottle serves up to six, and a magnum offers 12. However, the variety of bottle sizes extends beyond magnum.

Exceptionally large wine bottles such as the Methuselah, Solomon, and the largest, the Melchizedek, provide about 30, 130, and 180 glasses, respectively. Other large sizes like the Nebuchadnezzar can serve 100 glasses. These giant bottles are typically more suited for large gatherings like weddings. Keeping wine in such large bottles for too long without consuming it can lead to the wine aging poorly and becoming stale.

Read the original article on Chowhound.