World Centric® compostable 6.7″ TPLA knives are made from 100% non-GMO plant starch PLA resin. These biodegradable utensils will completely compost in a commercial composting facility within 90-180 days. Home composting is not advised for this compostable utensils, as they do require a higher heat to break down, which may not occur in most home composting systems.