Where does the “fizz” in soda come from?

In the brief guide, we are going to answer the question ‘Where does the “fizz” in soda come from’ with a detailed analysis of what safety measures are to keep in mind when used in our daily routine.

Where does the “fizz” in soda come from?

The “fizz” in soda comes from the gas called carbon dioxide which creates the bubbles. To give the soda that distinctive fizz, the soda pop company adds carbon dioxide. In this activity with soda pop, you can see some of this carbon dioxide bubble, pop, and fizz!

Why do fizzy drinks produce bubbles?

The gas that gives fizzy drinks their fizz is carbon dioxide. Since a liquid can hold more gas when it is under pressure, the carbon dioxide in the drink remains dissolved as a result of the high pressure in the bottle. The pressure is released when you crack open a brand-new bottle of soda.

You then pour your carbonated beverage into a glass. The high pressure that once kept the carbon dioxide in a liquid form has dissipated. The drink contains more carbon dioxide than it can hold, so the excess escapes as bubbles. However, it doesn’t all rush out at once.

Why does the bottom produce the bubbles?

The gas bubbles out quite slowly at the bottom and sides of the glass as opposed to immediately bubbling out of the drink. This is due to the difficulty in creating bubbles. 

You can think of it like this: the tiny carbon dioxide molecules want to escape the beverage, but to do so, they first need to group together and form a bubble. It doesn’t happen very often that enough of them stick together to form a bubble because they are all randomly jiggling around inside the liquid.

The bottom and sides of the glass have microscopic dents and scratches as well as other minor flaws. Already, a tiny bubble of gas is entrapped in these flaws. This bubble and a carbon dioxide molecule collide and merge, creating a bubble that is too large for the scratch or dent to contain. 

The bubble splits in half, with some of it remaining behind while the other half floats to the surface and pops. The same thing may keep happening repeatedly because some of it remains behind. This explains why certain areas of the glass are emitting a stream of tiny bubbles. Actually, some glasses are made to have these tiny dings so that more bubbles can form.

How can you reduce soda’s fizzing?

Take a spotless glass. (The glass is dirty if there are bubbles coming from something on it.)

Use wet ice when the water is at a freezing temperature (not ice from the fridge below 32 F).

Before pouring soda into the glass, allow it to cool. In other words, don’t just pour it onto the ice in the middle of the glass. Consider attempting to fill the glass with water without any bubbles.

Do sodas ever go bad?

Since soda is non-perishable, it never truly goes bad. When carbonated beverages are not properly stored or are kept for an extended period of time, the fizz and flavor are lost.

Your favorite carbonated beverage has no expiration date. Instead of a safety date, it includes a “sell-by” or “best before” date, which is merely a quality date.

Even if the soda is unopened, the fact that it has passed its sell-by date does not necessarily indicate that it has gone bad.

How do you prepare fizzy drinks?


  • cup
  • citrus squeezer
  • water
  • spoon
  • lemons
  • baking soda
  • sugar


Use the lemon squeezer to extract as much juice as you can after cutting it in half. When using a knife, make sure to get an adult’s assistance.

Pour lemon juice into the cup halfway, then top it off with water.

Add the baking soda by stirring with a spoon.

After tasting it, add as much sugar as is required to make it sweet.

Why do we keep soda in the refrigerator?

While you don’t want to freeze the soda, one way to achieve this is to keep it as cold as possible in the refrigerator. Cold soda can hold more carbon dioxide because the molecules of carbon dioxide have less energy to escape when it is cold.

Soda that has been sitting unrefrigerated on the store shelves will be fizzier than soda that you purchase cold.

Other FAQs about Soda that you may be interested in.

What is tonic?

Can you freeze 7up?

Why does soda go flat in the fridge?

How to read the soda expiration date


In the brief guide, we discussed answering the question ‘Where does the “fizz” in soda come from’ with a detailed analysis of what safety measures are to keep in mind when used in our daily routine.