Why are soft drink and soda water bottles sealed under high pressure in beverage industries?

Soft drink and soda water bottles are sealed under high pressure in beverage industries to increase the solubility of carbon dioxide. Henry's Law states that the amount of a gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the surface of the liquid. By increasing the pressure inside the sealed bottle, more carbon dioxide molecules are forced into the liquid. When the bottle is opened, the pressure is released, the solubility of carbon dioxide decreases dramatically, and the dissolved gas rapidly escapes the solution.