A cylindrical PE liner bag matched to same-size vertical stainless steel drums. Made from single-layer high-purity PE with strict particle and metal leaching control, it suits precision chemical media such as photoresists and electronic cleaning liquids. The cylindrical shape follows the drum contour, leaving almost no material clinging after discharge. Supplied with a complete sealing kit, the clips and dust cover fully isolate external contaminants. The standard opening on top fits dedicated supply tubes, and single-use operation removes the need to clean the drum, greatly simplifying material changeover in cleanrooms.