Seltzer water is a type of carbonated water that is created by adding carbon dioxide gas under pressure to still water. This process gives it a bubbly texture and a refreshing taste. Seltzer is often enjoyed on its own or used as a mixer in various beverages. Unlike tonic water, which contains added sugars and flavors, seltzer water is typically free of calories and sweeteners. It can be flavored with natural essences or fruits, making it a popular choice for those looking for a healthier alternative to sugary drinks. Many people enjoy seltzer as a way to stay hydrated while adding a bit of fizz to their day.