Various types of food packaging have been supplemented with silver-containing compounds to deter microbial growth and extend product shelf life. Some of these packaging types include bulk food storage containers, paperboard cartons, plastic or paper food wraps, and milk containers (Appendini and Hotchkiss, 2002). Silver zeolite is the silver-containing compound used in food packaging (Appendini and Hotchkiss, 2002). Although few silver-containing compounds are approved by the FDA for direct food contact, silver-incorporated food packaging is quite widespread in Japan (Appendini and Hotchkiss, 2002).