That is a good post on packaging, we'd need some seriously big plastic Easter eggs though. And I'll bet "Fragile Live Embryos" really freaks out the postal employees, I know it would me. I'd be wondering what kind of embryos they were.Check out post #40206:
https://www.backyardchickens.com/t/25/california-northern/40200#post_12873606
-Kathy