Question about water!

I drink a lot of water each day but in the form of coffee, green tea, regular tea, etc...(no juices or sodas). Are these considered a part of the gallon of water that I should drink each day or aren't they counted at all?

Thanks.
Updates
+1 y
Half a gallon = 8 glasses of water. I meant drinking half a gallon, guys. Please answer my question and stop giving me an answer that's offpoint.
Question about water!
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