Psm cutlery : Made from psm, 100% biodegradable and compostable, heat resistance starch cutlery The biodegradable dinnerware(fork, knife, spoon, soup spoon)is made of non-gmo corn starch This biodegradable dinnerware will withstand temperatures of up to 220 degrees (f). This biodegradable dinnerware is healthy, nontoxic, harmless and sanitary. Iso14851, fda&en71, ok compost, en13432 , non-gmo certificate, end-product's fda testing report.