The 5-petal flower design of the bottom of the soft drink and carbonated water bottle helps disperse pressure, increase stiffness, and support the bottle to stand firmly .
Many people when buying drinks, especially soft drinks, often wonder why the bottom of the bottle has a five-petal flower shape. Some think that the purpose of this design is to hold less drink and deceive consumers' eyes. However, in reality, each water bottle has a standard capacity and the liquid filling into the bottle must be within the prescribed standard error. Therefore, the above reasoning is unreasonable.
Carbonated water bottles are usually concave at the bottom and not flat like regular water bottles.
Generally, the bottle bottom design with a raised five-petal flower shape mainly contains carbonated drinks . Shaking carbonated drinks during transportation will promote the decomposition of carbonation and produce a large amount of bubbles containing carbon dioxide.
This increases the volume of the beverage gas, thereby creating a large pressure, which is at risk of damaging and exploding the bottle. The flower-shaped bottom design of the bottle can effectively disperse the pressure, avoiding the risk of exploding the bottle.
Another advantage of the five-petal flower bottom design is to increase the rigidity, avoiding the possibility of being knocked over when stacking many bottles together . For example, supermarket shelves are filled with flat-bottomed carbonated soft drinks. If someone accidentally touches the shelf or is not careful when taking and placing a drink, the situation will be like a domino, knocking over a row of water bottles. However, the five-petal flower bottom of the bottle has a greater grip on the shelf, so if one bottle accidentally falls, it will not drag other bottles of drinks, thereby minimizing damage and increasing safety.
When pouring carbonated drinks, the manufacturer must pump carbon dioxide gas into the bottle, at which point the bottle must withstand about 4 atm (a unit of pressure measurement). PET plastic used to contain soft drinks is not as hard as glass bottles, so the bottom of the bottle must be designed with a concave shape and a structure of long, thin ribs, helping the pressure to be evenly distributed at the bottom of the bottle, making the bottle stand firmly after being filled with carbonated soft drinks.
