It Is way stronger and lighter than common plaster-of-Paris ornaments, and isn't so liable to chip or crack if struck with anything. This employs recycled newsprint and that is molded right into a condition which guards the eggs. More recently, egg cartons have also been made out of expanded polystyrene https://gabletoppak.wordpress.com/2024/10/05/embracing-sustainability-with-water-in-gabletop-pak/