Dunno.
I supplement my doorstep with 2 pint Sainsbury's at £1.25 a throw. Rather more milk for the money.
Have cancelled milkman for a fortnight over the Festive Season. We'll be away some of the time and there are several days without delivery. I can't easily freeze milk in glass bottles and M&M have failed to supply all ordered milk in previous years, so I'll stock & freeze, defrosting as needed.
Getting 4 pint bottles will make this MUCH cheaper!