Plug Caps are specially designed internal-fitting closures that provide a streamlined and space-efficient sealing solution for plastic packaging tubes. Unlike traditional caps that fit over the outside of a tube, plug caps are inserted directly into the inner diameter of the tube, significantly reducing the overall external dimensions of the package. This makes them particularly ideal for applications where a low-profile, sleek package design is essential—such as in retail displays, sample kits, or compact storage environments. Since this cap occupies internal space within the tube, it may come into slight contact or interference with the enclosed product. To ensure proper fit and performance, this internal displacement should be taken into account by adjusting the total length of the tube accordingly.
In short, plug caps offer a unique combination of minimalist design and functional efficiency, making them a preferred choice when external space is at a premium and a clean, modern appearance is desired.
