In addition to the changes in the shape of the packaging bag, the special-shaped bag can also increase many application functions, such as adding a hand hole, adding a zipper, adding a mouth and other ways. In addition, with the change of the shape of the bottom of the self-standing bag, a large liquid self-standing bag with a carrying hole and a mouth with a capacity of 2 liters can be made for packaging heavy-duty liquid products such as edible oils. Another example is the addition of aircraft hanging holes on lightweight packaging to facilitate the hanging and sales of supermarket shelves. Some supplementary liquid packaging can be filled with mouth-like special-shaped bags for easy filling. For example, some laundry detergent packaging in Japan has a bag corner that can be buckled on the packaging bag. When in use, the two can be buckled to form a clever handle and pouring mouth.

In short, compared with ordinary packaging, special-shaped bags are more attractive, product information is clear, promotional effect is very obvious, and can be arbitrarily added zipper, hand hole, mouth and other application functions, so that the packaging is more convenient to use, more humane. At the same time, the special-shaped bag also has some unique advantages of flexible packaging. Compared with traditional packaging methods such as glass bottles, plastic bottles or tinplate, it can save storage costs and transportation costs, and is an optimized choice.