The nonic glass has a wide opening that allows a lot of the beer’s aroma to dissipate. But that design also makes it easy to chug a pint (~19 ounces in the UK and 16 ounces in the US).
The catch is that most bars will bring you pint glasses, which carry up to 16 ounces when full to the brim. So if you're filling your glasses all the way, your pitcher will amount to just under ...