Looks great but what would the mark-up be?
Best price i could find was over $3 each and you would mostly need 2, so you would probably be looking at least $8-$10 extra. I'm just thinking if the prices were lower, or maybe if one would work instead of two? They do come in different sizes. Double boxing and all the extra packing stuff (peanuts, foam, shredded paper, pine shaving, whatever choice of packing) wouldn't be necessary.
But besides price, do you think it would work safely? See any other downsides to the product itself?
One other thing, if standard egg cartons were used and standard Priority boxes to mail, the packing could probably be reused.