So there's so much knowledge about the mouth of plastic bottles

A small plastic bottle that we often use and come into contact with frequently in our daily lives. However, it is easy for us to overlook it, unless it brings inconvenience to us during normal use, it will only attract our attention.
Let's take a look at the mouth selection of plastic bottles. The diameter of the plastic bottle mouth varies from large to small, with various shapes, although there are significant differences and many styles. However, the design of the plastic bottle mouth is not arbitrary. It must be convenient for consumers to use and ensure the quality and storage of the packaged product.
For agricultural packaging bottles, the liquid packaging bottle has a small mouth. The advantage of this design is good sealing, saving aluminum foil gaskets, and reducing leakage problems; The solid packaging bottle has a large mouth, usually straight up and down, and the design reason is of course for easy filling. Generally, the bottle edge is designed to be wider, which is more convenient for aluminum foil sealing, has a larger contact surface, and reduces leakage problems. However, some customers prefer the bottle edge to be straight up and down, which ensures that all liquids are poured out without leaving any residue. Different choices have their own advantages and disadvantages.
Another product is an anti-theft cap, which requires a protruding thread at the bottle mouth and a buckle with the cap (as shown in the figure). The advantage of anti-theft caps is that they are firmly sealed, leak proof, and have good storage performance, preventing the liquid inside the bottle from being contaminated by bacteria.
For plastic bottles for beverages, the shape and diameter of the bottle mouth need to take into account the convenience of the human mouth when drinking, and the beverage should not be easily spilled or difficult to pour during the drinking process, which is a great harm to the consumer experience. Therefore, the mouth of plastic beverage bottles must be moderate, and there should be differences for the children and adult beverage markets.
For dry fruits and Pickled vegetables, plastic bottles with wide mouth should be used, which is mainly convenient to take. For some powdery drugs and products, narrow mouth and fine pore plastic bottle mouths should be used.