Is it safe to drink sour milk?!

Is it safe to drink sour milk?

I have a bottle of milk with me at work today, on opening the bottle there was a slight odour and it tastes slightly sour but hasn't gone lumpy yet. Would it be safe to drink, albeit if I don't mind the taste? Or could it even be beneficial in some "extra bacteria" sort of way like Yakult????

2 days ago
It's not the cost it's just that having sipped it a bit it didn't seem too unpleasant although it is definatley sour. It has been refrigerated and I brought it to work in a cool bag. I wondered if it could even be beneficial? Hhhhmmmm maybe I'll leave it and go for the water instead.

Believe it or not, it won't harm you. This sounds really gross, and it is, but when I was little, we had some milk that went bad. You could see the milk on the bottom, and the whey on the top. My mom shook it up, and we drank it. It tasted like buttermilk, and was yummy. No one got sick.