Essentially, there are two styles of flexible pouches. The lay-flat pouch is a space-efficient choice for those wanting less material and easy storage. While it can be used with almost any product, this type of plastic pouch packaging works particularly well for single-serve applications. In comparison, the stand-up pouch has an added gusset at the bottom allowing the pouch bag to stand on its own while holding a larger volume. This gives it an eye-catching presence on retail shelves. To either kind of pouch pack, zippers can be inserted, making them resealable, and punch holes can be added for hanging in retail stores.