Oh, for cushion! It absorbs impact, so if you've decided you want to ship the eggs all individually wrapped yet loose (not in cartons), you put down a thick layer of sawdust, then arrange a layer of eggs, a layer of sawdust, etc. Make sure it's packed very tight when you close the top and then there's less movement and impact on the eggs. That's what I consider "old school packing." But he just put bubble wrap in the bottom, around the sides, and on top and wrapped all the eggs in newspaper and put them in.
Ooooh, ok! I read through a best practices article for shipping eggs somewhere and I really liked the one showing individually wrapping the eggs in bubble wrap like candy with the rubber bands on the ends. The box was then filled, bottom, between, and top with packing peanuts and put into a larger box that was also surrounded by bubble wrap. I'm going to try it eventually when I'm feeling brave and someone wants some eggs from my neck of the woods. lol
I would try the sawdust approach as well if I knew where I could readily get some sawdust without waiting for my husband to actually finish a project. lol