CHIC, here's the link to Dipsy's page on wrapping:
https://www.backyardchickens.com/web/viewblog.php?id=17-wrapping-packing-eggs
And she is a great shipper! I have received 3 orders from her and NOT one chipped or cracked egg!
I do a variation of this. I use a large USPS mailing box (not the standard sized same priced ship boxes) I wrap my eggs in bubble wrap, Put them in a box, then surround the box with cushioning materials, newspaper, foam, packing bubbles, crumbled and died brown bags, plastic bags and even neatl arranged and clean styrofoamed egg containers....Whatever will buffer the inner box from blows that might happen in travel. I basically custom design packing for the boxes. My system of mailing is usually more expensive than using a standardized priority ship box and certainly more labor intensive , but I find that the eggs arrive more safely than those I have received from shipping in a standardized box without customized packing.
The writing on the outside is very important as well, I make many different kinds of notations on the outside of the box regarding contents and add any special instructions that they buyer might have.
Please do a search for packing eggs. I know that houndit has a posting on packing eggs.
Great luck with your venture....PS you might get better responses if you have the moderator move this topic to a forum where this is being discussed.
If I can help you along the way with any questions you might have on this topic, feel free to pm me....Or if you need any eggs, we have a wide variety from wellsummers, buff orpingtons, black copper marans, pure mahogany eggs, etc., etc.............
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Hope this was helpful and have a blessed day.