where can we get water from

Juice, coffee, and tea all have some amount of water in them. But we can not substitute these things for water. These three items contain other things in them besides water, and we need all the minerals that regular water has to offer. Not just part of them.

Water can't be replaced. My simple reason is : If your body is 80% water, can you replace it with coffee ? of Juice? no. both coffee and juice contain some substances that aren't used in our body, so why should a complex liquid change a simple one? just think about all the energy out bodies would use to get coffee into a simpler form.