Zipper bags, also known as resealable bags, feature an anchor-shaped convex ridge and groove on the finished bag. The opening has corresponding ridges and grooves like a zipper, allowing the bag to be easily opened and closed with slight force, and it can be reused multiple times. However, the bag cannot be easily opened by the internal pressure of the packaged items or external force. Zipper bags provide reliable, non-toxic, odorless, and pollution-free packaging. They are lightweight and convenient, making them highly popular among users. These bags can be used to package various products, such as books, clothing, industrial parts, toys, electronics, wires, hardware, screws, rubber and plastic products, and are particularly suitable for items that require frequent opening and closing, such as candies and cooked food.