I have been experimenting with different methods of packing the eggs and so far, the one I have had best reports on is to wrap each egg in a sheet of newspaper and firmly pack those wads into a small box. I re-use the boxes that beverages come in, for example, and then put that box inside a flat rate priority box and pack wads of news paper around that until it can't move within the outher box. I have done the same thing with a plastic shopping bag, put all my wads of paper wrapped eggs in the plastic bag, tie it snug around the eggs, pad the bottom of a box with wads of paper, and stuff, even jam, paper wads around it firmly until it cannot budge inside the box and is tightly supported on all sides, away from the sides of the box. All eggs made it in good shape. i have packed in sawdust, bubble wrap, packing peanuts (the worst so far) and yesterday I sent some eggs to Alaska in a styrofoam box that dog vaccines came in, bottom layered with sawdust, eggs wadded heavily in newspaper, more sawdust packed on top, stryfofoam box inside a cardboard box, more newspaper wadded up and packed between the styrofaom box and the cardboard box to minimize movemetn. We will see how it comes out in another day or so... for me, i have found that packing in egg cartons did not work so well and has cost me a few second sets of eggs.... for what it's worth... I'm sure everyone's experience is different and some of it is just chance, different carriers, how fast the machine whips it through the system, how high the pile is that the box tumbles out on at the time of sorting, the weather, you name it. some thing are just out of our control, no matter how well the eggs are packed.