Although most plastic bottles have four ‘feet’ at the bottom to withstand internal pressure, not all of them have this design. In the case of non-carbonated drinks, the containers usually have a flat bottom. Why is this?
Why non-carbonated drinks have flat-bottomed bottles
The explanation lies in the internal pressure of each type of drink. Carbonated drinks contain carbon dioxide, which creates high pressure inside the bottle. They therefore need a base with indentations to help distribute this pressure evenly and prevent the container from deforming or breaking.
On the other hand, non-carbonated drinks do not have this extra pressure, so they can use flat-bottomed bottles without risk of damage to the container.
On the other hand, a flat base on non-carbonated beverage bottles provides stability, which is very important for storage and transport. This reduces the risk of the bottles tipping over easily.
In addition, this type of non-carbonated beverage container can remain stable and is easier to compact or recycle.
