With regard to the problem of prolonged mildew in PET bottles, it is currently a major problem that has plagued the beverage industry. There has been no effective solution. In the past, various bottle cap transformation methods were not satisfactory, but the industry has also been seeking new solutions.

Recently, a new type of sealing structure design has attracted the attention of some industry players. A senior person pointed out that the sealing structure added a seal at the bottom of the lid without changing the existing bottle top sealing structure and sealing effect. The thread of the bottle mouth is protected to avoid contamination in the circulation and sales process, thus eliminating the safety and hygiene hazards of the threaded part of the bottle mouth. At the same time, because the bottom of the lid is sealed more, the chance that the beverage itself is contaminated and becomes defective will be greatly reduced. The sealing structure is suitable for the sealing of various beverages, and its production cost does not increase substantially in comparison with the current technology in the long run.

At present, there have been reports of contamination of the bottle mouth, which are usually handled as individual events. However, professionals in the industry know that this is a certain flaw in the sealing structure. In fact, the currently used plastic beverage bottle sealing structure does not protect the hygiene of the threaded part of the bottle mouth, because the threaded part of the bottle mouth is not sealed.

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