Made from unbleached plant fiber, an annually renewable resource. They contain no added PFAS. Great for use with hot or cold food items. The lids are 100% compostable in two to four months in a commercial composting facility. No Added PFAS—Bio-lining made from plants to create a moisture barrier. Food Container Type: Lid; Material(s): Unbleached Plant Fiber; No added PFAS; Color(s): Natural; Diameter: 3.7".