Technically, a standard bottle holds 750 milliliters—or about 25.4 fluid ounces. That’s roughly five glasses of wine, if you’re pouring a proper 5-ounce serving.
But here’s a fun little fact: that number isn’t random. It was standardized in the 1970s to be a perfect multiple of the average lung capacity of a glassblower—believe it or not. Tradition meets biology.
