Seltzer is simply water that has been carbonated by infusing it with carbon dioxide gas under pressure, resulting in bubbly, fizzy water. It is essentially the same as sparkling water and can be plain or flavored by adding fruit essences. Unlike club soda, seltzer typically does not contain added minerals or salts. It is a popular, calorie-free, and sugar-free alternative to sugary sodas and other fizzy drinks.
