There are now several “green” packing materials. EcoCradle is a product made from fungal mycelium (mushroom roots) on rice hulls or other organic byproducts. It looks a little like Styrofoam. The root mass is biodegradable, renewable, can be put in a garden, doesn’t attract pests and is competitive in price. Another “green” packing material is PaperNuts, made from recycled paper. Of course the easiest and least expensive is homemade shredded or crumpled newspapers. Don’t use popcorn. It attracts bugs and mice.