Seltzer is a type of carbonated water that is known for its refreshing taste and effervescence. It is created by infusing water with carbon dioxide gas under pressure, resulting in bubbles that create a fizzy sensation. Seltzer can be enjoyed on its own or used as a mixer in various cocktails and beverages, making it a versatile choice for many drink enthusiasts. Unlike tonic water, which contains added sugars and flavors, seltzer is typically free of calories and sweeteners. This makes it a popular choice for those looking to hydrate without added sugars. Many brands also offer flavored seltzers, providing a variety of options for consumers who enjoy a hint of taste without the calories of traditional soft drinks.