Material is food grade polypropylene virgin. Sprout container is 3 and 1 lid. 2 container making a sprouts and 1 container store water. Sprouts are highly nutritious food it provides all vitamins, proteins and other minerals that our body requires and in a natural way. Sprouts are ideal for people on diet. Food Grade Hygienic Odourless. Air vent for constant fresh air. Cap to drain excess water and maintain constant moisture level.