I only very rarely drink milk straight but will use it in my tea or coffee at times. I always shake the bottle prior to pouring - no matter how little amount is to be poured! Have always shaken the bottle/jug/gallon/carton/whatever. Must be a learned habit from my father who grew up on a dairy farm
Yes, I shake the milk. The cream in the milk separates and you can see the line between the cream and milk. My milk comes from a farm up the road. After having fresh milk, I can't switch back.