Which glass is filled correctly?

The Final Verdict

So, which glass is truly correct?

The answer is Glass 3!

Here’s why Glass 3 is the ideal pour:
By filling the wine just below the widest part of the bowl, you achieve two important things at once. First, you maximize surface exposure, allowing the wine to breathe properly. Second, you leave enough “headspace” in the glass. This empty space acts like a chimney, collecting aromas right where your nose meets the glass when you sip.

A standard proper pour of red wine is about 5 ounces (around 150 ml), which typically fills a glass to the exact level shown in Glass 3.

So next time you pour wine for yourself or guests, resist the temptation to fill it like Glass 4, and let your wine have the space it needs to shine. Cheers to pouring like a pro!