¹ According to U.S. Health and Human Service Department records, there have been zero cases of food borne illness from failure of metal packaging.
² "Estimates of Foodborne Illness," Centers for Disease Control and Prevention, 19 Apr. 2011.
³ "Sustainability: The Advantages of Metal Packaging," Empac.
⁴ "The Sustainable Metal Can: Packaging for Today and for the Future," Can Manufacturing Institute, 27 Sept 2005.