You can add milk in some cases where it’s often listed in ‘pints’, although I often see it in 1 and 2.5 litre bottles these days. We also order draught beer/lager in pints and I think this is more down to the culture and that link to the old days. I can’t imagine walking into a pub and asking for 0.57 litres of lager. On the continent they seem to just ask for large or small beers in bars which is perhaps less awkward.
In regards to engineering, we use metric entirely. Everything is measured in millimetres in the industry I work in along with kilo newtons (kN) rather than pounds of pressure etc. We sometimes deal with American automotive companies where there is a demand for dual dimensioning but the US markets are becoming less lucrative for us and thankfully these relationships are starting to run their course. You wouldn’t believe how many arguments have been had over rounding 25.4mm and 50.8mm dimensions down as the conversion baffles our American technical friends.
I’ve worked in the American auto OE biz since 1979, not retired yet.
1979-1984 was a mechanical draftsman, for GM and Ford BIW welding fixtures.
1985-1989 Direct at GM as Senior Manufacturing Engineer
1989 - current Nissan many positions in vehicle development
(With family / friends in all the other OE’s )
All car parts are 100% metric units , been that way long long time.
Now, unfortunately the tooling industry has dual stds on some legacy stuff, that can cause issues at times.
It’s been a long long long time since I’ve used 0.03937008 ….