The sealing structure uses the friction between the tongue, dust flap, and the panels to achieve and maintain sealing. The sealing strength and reliability is at a medium level, which makes it suitable for small, lightweight daily necessities and pharmaceutical packaging.

The glued sealing structure with the panels attached to the flap stick together. Locking strength and reliability of the seal end structure is outstanding, making it highly suitable for an assembly line packaging process.

Snap-lock bottom, also called 1-2-3 closure, has a simple, aesthetic, and economic bottom structure with great strength and tightness. It is the most commonly used lock bottom structure and is widely used in cosmetics, alcohol, and food packaging.

The automatic lock bottom refers to a design where the body and the bottom of the box can be folded into a flat plate shape. When the box is stretched open, the bottom of the box automatically restores itself to a locked, sealing status.