Have you ever had a soft drink, beer or water and wondered, "Why don't they bottle it full?"
Soft drinks are a favorite drink of many people, especially young people. However, have you ever noticed and wondered why people do not fill soft drinks bottles to the cap? Is it possible that manufacturers reduce the amount of water to reduce costs and increase profits?
According to the manufacturer, soft drinks are not bottled full due to problems related to the pressure of the gas in the bottle.
When the liquid expands and meets the bottle cap, it will create great pressure and push the cap out. (Illustration photo).
When manufacturing bottles, people often leave extra volume inside to ensure that it contains the correct amount of water according to the manufacturer's standards while still leaving some space for air expansion.
The manufacturer calculates this to avoid the case where the temperature in the place where the soft drink is stored is higher than the temperature in the place where it is produced. To avoid the situation where the cap pops off when the liquid in the bottle expands due to heat. When the liquid expands and meets the bottle cap, it will create a large pressure that pushes the cap off.
If the bottle has space, the expanding air will still have enough room to be compressed to keep the bottle safe; because liquids are incompressible, while gases are.
In addition, when the liquid expands but is blocked by the bottle cap, a large pressure will be formed. Therefore, if the water bottle is filled, the cap will pop off, affecting the transportation and storage process. In some cases, this situation can also cause danger to the user.
Not to mention, when the bottle is running through the production line, if the water is filled to the brim, the liquid will splash out, causing damage to the line. When consumers open the bottle to drink, the full amount of water will easily spill onto their hands, clothes, and belongings.
Thus, the characteristic properties of liquids have led to changes in the production, transportation and storage processes. That is why people do not bottle soft drinks to the cap. This way of bottling will ensure the quality of soft drink products as well as safety.
Another interesting point in soft drink bottling is that people use plastic twist caps for plastic bottles and metal caps for glass bottles. These techniques both serve the purpose of safety, reducing breakage when transporting water bottles.
