Do you drink water that’s been in a glass overnight?

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Is it safe to drink a glass of water you left sitting out overnight?

Apparently it’s NOT a great idea, especially if it’s an open glass that bacteria can fall into.  But even a bottle of water starts to grow bacteria once it’s touched your lips.

Experts say that in general, once you’ve put your lips to a bottle of water, you should try to drink it the same day or dump it out.