Bioresin is a thermoplastic made from organic materials instead of petroleum products. Bioresin is a substitute for PET and polystyrene and can replace polyethylene and polypropylene. Our bioresin cutlery is made from renewable cellulose wood and grass fiber instead of oil based materials. Certified compostable, our bioresin knives, forks, and spoons have high temperature resistance up to 180 - 190 degrees F.