Adding a zipper to your pouch can help you increase its usefulness. A zipper adds to the utility of the stand up bag in this way: When a customer takes the pouch home, instead of pouring the contents out, they can store them in the bag. Since the zipper lets them open and close the pouch multiple times, they can be sure that the contents are safe. Thus a zipper eliminates the need to store the contents in another medium.
Adding a zipper doesn't drastically raise the cost of the pouch, so it's an affordable solution. For solid products however, the zipper is a good addition. If you are planning to get a zipper on the bag, make sure you also get tear notches. With a notch at each side, the customer can easily open the bag without looking for scissors or cutters. The zipper is located below the tear notches and can be used once the packet is torn open.