I have shipped a lot of eggs, and never used ice packs. I use the same method Wayne Used when he shipped my first order of hatching eggs. Individually wrap each egg with small bubble wrap, leaving the ends open. Then line the box with big bubble wrap so you have two layers thick (this includes the sides). Then I set a row in bottom so they are fairly tight fitting. I then put another layer of big bubble wrap on top of the bottom layer of eggs, sometimes two. Then proceed with another layer of eggs etc. I continue this until box is full and make sure they are tightly placed so there is no room for them to slide or get misplaced. I have never had anybody report a broken egg doing it this way. I always ask them to let me know when and how they arrive. Most people have also reported good success with there hatch also, I only send what I can gather in a 3 day period also so they have plenty of time to get there in transit.