Soda water has zero calories and contains no fats, proteins or carbohydrates. Typically, the beverage contains about 10 milligrams of sodium. Soda water is simply water with added carbonation.
During the production of soda water, carbon dioxide is added to plain water. The gas is introduced through tanks or cartridges. This increases the pressure of the liquid and forms the characteristic bubbles. The carbonation process makes the water slightly acidic. Soda water is offered in bottled form, but in commercial establishments, it is often dispensed with a soda "gun" or siphon. Carbon dioxide cartridges are attached to the handle of the dispenser, and carbonation is added to water each time the implement is used.