Packaging closures play an important role in protecting products during storage and transportation. They help prevent external exposure and reduce the possibility of leakage when containers are moved. The compatibility between the cap and the bottle or jerrycan neck must be considered to ensure that the closure system works properly. Cap designs should also match the characteristics of the product and its intended use.

During packaging development, closure compatibility should be tested together with the container body. Inspections may include thread conditions, connection strength, and closing performance according to product specifications. Using suitable closures helps improve packaging reliability and user convenience. Paying attention to small components such as caps can make a significant difference to overall product quality.

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