These rustproof, unbreakable, non-corroding fuel cans were developed by the Scepter Corporation using patented DuPont™ laminar technology. These cans meet or exceed California s stringent permeation-level requirements. In addition, these cans are UL-certified to ASTM standard PS91.00. Scepter has also developed the patented Spill-Proof Spout , a self-venting spout that automatically shuts off when the gas tank reaches capacity.