Product Characteristics "Gracz" is produced from natural plant fibers, not wood fibers, and decomposed within 6 weeks. Product Characteristics Made from natural plant fibers. Free of cancer causing agents. Safe for food and non toxic. Biodegradable in the ground within 6 weeks. No waste generated from production processes. Certified for international standard of biodegradable products. Clean with quality control throughout the production processes. Water and hot oil resistance without leaks. Ovenable and microwavable. Shelf life for 5 years.