Water covers 71% of the earth's surface; only 0.3% of that is fresh water & accessible for human consumption.
This finite resource is the most important substance in the world. The human body is composed of 50-60% water, making it the most important substance for us as well. Every cell, organ and function in the human body relies upon water in some capacity.
BUT NOT ALL WATER IS CREATED EQUAL.
The three most commonly consumed waters are tap, bottled, and reverse osmosis.