1960, Harriette Simpson Arnow, Seedtime on the Cumberland
No proper place for cooling milk in summer meant not only blinky milk unfit to drink, but no sweet cream for the cream jug that most of them had, and neither good butter nor buttermilk could come from milk not properly cooled.
2013, Steve Blow, "Beward of toxic milk — and other expiration-date silliness," (w), 12 October, 2013, http://www.dallasnews.com/news/columnists/steve-blow/20131012-beware-of-toxic-milk--and-other-expiration-date-silliness.ece
I mean really, who needs a date stamped on the jug to tell you when milk has gone bad? It’s got a built-in warning system. First, you get that little whang in the taste. It’s gone blinky. Time to think about getting more.