If we say water then connotation we will lead to water that is not mixed with additional ingredients such as tea, milk, coffee and others. Well, if the water here mentioned it so intended.
Drinking tea or milk, is not equal to the white water. You can not replace water by drinking milk, tea, coffee, and others.
To maintain our health is recommended to drink at least 2 liters of water per day, equivalent to 10 cups. As for smokers, should consume more of it.
80% of our body is composed of water, the body part containing the highest water content is the blood that consists of 95% water next is the brain that contains 90% water. We remove the water every day through sweat, urine, and respiratory secretions. If we lack of drinking water, the most severe working organ is the kidney