Mushroom Mycelium Packaging. Yes, you read that correctly! Custom molds are filled with recycled agriculture byproducts like corn, hemp, wood or bamboo, then they're inoculated with spores and the mycelium, or root structure, of the mushroom then grows and fills all of the spaces between the recycled particles, acting as a natural glue. - 100% compostable - Flame resistant - Light & strong - C2C Gold Standard (highest certification for sustainable goods) . Welcome to the future of packaging.