Rieke 70 mm Flexspout is a direct replacement for all of our 5 Gal. container caps. I wish that I could ship every container with these caps but it would be too expensive. So you can buy one and use it over and over again. Just pop off the plastic star and the flexspout pulls out. Unscrew the black plastic cap and pull the barrier out and your ready to place on your HAZMAT container.