The most commonly used design is normally uncoated with an open top and a PE liner inserted, although, coated designs are also available with spouted tops. Base designs vary greatly depending on the application; these include square, star or a single seam. Discharge spouts can also be applied, but this is specifically for the square base design only. For a manual filling application, bags are press bailed and packed on pallets; however, bags can also be wound on rolls to be used on automatic filling stations if required.