I'm not sure where you live but in the UK / a lot of parts of the world nowadays ...we don't do milk delivery now (never heard of bread delivery, but I'm sure that is / was a thing too, along with butter, cream, cheese, eggs, meat and vegetables)
Its certainly an old fashioned thing. I remember milk delivery was a thing some people had when I was a child in the 90's, I'm now 30. Also happened way before my time too, of course. I think due to a lack of good refrigeration and convenience factor ...people generally don't opt for this service now
People today go to the shop, use public transport - Period. I consider the use of this domain in 2021 to be limited. Sorry