Where is this at? I’ve never seen 440ml or 440ml cans in North America. Canned drinks/beers usually come in 355ml (12 US ounces), 473ml (16oz), 500ml (16.9 oz), or 19.2 US ounces (20 British ounces aka British pint). Other less common sizes are 8oz (236ml / Red Bull) and big beer formats like 24oz and 32oz (just shy of a litre).

404ml is around 13.66 US ounces or 14.2 imperial ounces. 440ml is around 14.7 US ounces or 15.5 imperial ounces.

Usually when you get a measurement that’s not a nice round number like 500 or 750 it means it was probably converted from some other measurement standard. But both measurements seem completely arbitrary for what I assume is an English speaking country.

I looked through some antique measurements but didn’t find anything useful. It seems to be more than half a chungah, but far less than a butt.