1、To make products marketable and usable, and add value to products;

2、To offer products protection, serve as a barrier to sunshine, wind, rain, dust and other natural hazards and protect products from volatilization, leakage, deterioration, becoming loose or containment to ensure safety of consumers when using products.

3、To add convenience in storage, transportation and selling to ensure successful delivery, and make it easier for purchasers to carry, open and use the products.  

4、To encourage potential buyers to purchase a product, make products more attractive to potential buyers and increase sales of products.