Bulk bags are usually emptied by a discharge spout, which is a spout that is attached to the bottom of the bulk bag. Usually the discharge spout is tucked inside a closure on the bottom of the bag. The closure is sometimes called a petal closure, pajama closure, star or x-cut closure. The closure is designed to protect the spout and to prevent the product from sifting out of the discharge before it's intended discharge. Discharge spouts can be customized with specific sizes and closures.