Water does make up everything that you drink so if you drink something you are drinking water so it would be impossible to never drink water unless you stop drinking anything at all.
And when you stop drinking anything at all you get dehydrated and then eventually die within a few days to a week if you're not hydrated again.
If you do not drink any water though and drink things other than straight water your kidneys could start to fail and your health will decline.
It's important to drink at least some water everyday to keep the toxins flushed out of your kidneys and other organs of your body.
You should aim to drink at least 8 glasses of water per day but even a few glasses of water per day is still better than nothing.
Not drinking water can also cause fatigue and headaches and lower your energy levels.
Water is very essential to human life so you have to drink some water other than drinks that contain water to keep your body healthy.