@ramsey
"This craft answer to the single-serve is an imperial pint, 20 British ounces—that’s where the 0.2 comes from. It’s the same diameter as a 16-ounce can, which comes in handy for canning-line flexibility.
[...] Volek, “19.2-ounce cans are the largest size that will take a standard can end. They maximize liquid volume without the need to make major modifications to the package lines.” " https://allaboutbeer.com/19-2-ounce-beers-are-on-the-rise-the-skinny-on-the-taller-cans/