How Are Bubbles Put into Soda Pop?
The bubbles in your favorite soft drink are made by a colorless, tasteless gas called carbon dioxide. This bubbly gas gives soda its tangy, fresh taste. At the bottling plant, a pump-like machine called a carbonator mixes the gas into ordinary cooled water.
The water is very cold so it can hold a lot of gas. They also use pressure to put more gas in the water than it could normally hold at that temperature.
The carbonated water is then flavored with cola, orange, lemon, or any one of many syrup flavorings. The soda pop is then tightly sealed in a can or a bottle. When you open a can of soda pop, the f-i-z-z you hear comes from the Escaping carbon dioxide.
When it’s all gone, your soft drink will taste flat. An unopened soda can is bubble-free because the pressure inside the can keeps the carbon dioxide dissolved in the liquid.