PLA consists of polylactides, also known colloquially as polylactic acids. It is made from corn glucose and is biodegradable. Biodegradable means not compostable. In industrial composting plants, PLA degrades within a few months. PLA is also broken down in domestic compost, but only after up to 80 years. So please don't throw the pearls of terror into nature ... The recycling code for polylactide is 07.