Mrs. Griffin’s Barbecue Sauce in Macon, Ga., a well-established Southern food brand and one of the Southeast’s most popular barbecue sauces since 1935, has converted its 12oz and 32oz products from glass to lightweight polyethylene terephthalate (PET) bottles from Amcor Rigid Plastics, the world’s leading producer of rigid plastic packaging. The packaging change represents Mrs. Griffin’s first use of PET bottles in its 76-year history.