[mattmanser]

275ml is half a pint, or one VERY LARGE glass, so, yes it is that big. That's over a third of a bottle of wine.

UK standard measures are 125ml small, 175ml medium, 250ml large.

175ml is a normal glass of wine and is 2.3 units, or 16 units a week. 23 units is 2 and a bit bottles of wine.

You've got your units wrong.

https://www.gov.uk/weights-measures-and-packaging-the-law/sp...

http://www.nhs.uk/Livewell/alcohol/Pages/alcohol-units.aspx