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How does packaging affect the carbonation of soft drinksFeatured science projectScience project video


This experiment was done to determine if the type of packaging material used affects the extent of carbonation of soft drinks. The experiment was done using Coca-Cola packaged in glass bottles, PET bottle and aluminum cans.


Coca-Cola beverage packed in glass bottles PET bottles  or aluminum containers will have the same amount of carbon dioxide per 100ml.

Scientific Terms

Carbonated, phosphoric acid, citric acid, pH


Soft drinks

Soft drinks are sweet beverages that do not contain alcohol. Soft drinks are often carbonated. They are carbonated by dissolving carbon dioxide in the beverage at high pressure during packaging. Soft drinks can be consumed at room temperature or more oftenly chilled. Some popular carbonated soft drinks are Coca Cola, Pepsi Cola, Root beer, Ice cream soda, Sprite and many more. Since they do not contain alcohol, soft drinks are popular among children and adults.
Most soft drinks contain phosphoric acid and citric acid. The pH level of most soft drinks is between 2.5 to 4.0. The level of acidity in a soft drink may vary depending on the manufacturer, type and flavor of beverage.

Soft drinks are available in glass bottles, PET bottles and aluminum cans. Glass bottles are heavy and tend to break easily. PET bottles are more flexible and lighter but they have a shorter shelf life because of the gradual loss of carbonation. Aluminum cans are lightweight and better at holding carbonation but they have a shorter shelf life than glass bottles.

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Complexity level:
Project cost ($):
Time required:
1 hour to prepare, 1 day for experiment
Material availability:
Easily found at a supermarket
Safety concerns: