This. You can tell pretty easily when milk is bad just by the taste. I wouldn't drink sour milk even if the expiration date wasn't for another week.Till it smells bad, cause its fine till then.
Honestly, not even one day, but then I do my best for that to never occur.
Same, though I don't bother with tasting part. I give it 2-3 days, but the milk is usually almost gone before it's close to experation.I throw it out when it smells/tastes bad
I don't drink it either, but I buy it cause a number of things I make need itI don't drink milk so not anything I ever thought about.