Features unique to our utility jugs include the Square design eliminating unusable spaces around the jug. They mate naturally and fit flush against walls and other flat surfaces. All jugs are manufactured from tough LLDPE polyethylene using our rotational molding process, which is why we can offer our exclusive Scribner warranty. The exclusive funnel top design and molded handle helps bleed air into the jug allowing the entire contents to be unloaded in approximately 9 seconds. Compare that with the other jugs around ! The extra heavy duty top features our unique, polyethylene gasket, with a larger and wider gasket seat and, unlike o - rings, there is no swelling and falling out after a month of use. IT NEVER FAILS and is warranteed just like the jug!