Trying to ship eggs for my brother to eat.
How should I do this?
Which mail carrier should I use?
Can I use styrofoam egg cartons from the store?
You might look at threads that talk about shipping eggs for hatching. The main concern with hatching eggs is that they might break while being shipped. That will probably be your main concern as well.
When people ship eggs for hatching, they tend to individually wrap each egg in some kind of padding (example: bubble wrap), then put the wrapped eggs into a box, then sometimes they put that box into a larger box with padding between the two layers of boxes.
With most egg cartons, if you shake the carton, the eggs can bang together a little bit. If that happens while they are being shipped, the eggs will typically break. Some people do ship eggs in cartons, but most apparently do not.
For which mail carrier, I know you can use the United States Post Office. I do not know whether any other carriers will accept eggs or not. That is something you might be able to find on their websites, or in threads that talk about shipping eggs for hatching.
You would want to ship fresh eggs, not ones that are already old. There is probably no point in refrigerating the eggs before you ship them, if they will not be kept cold while they are being shipped. It is probably better not to wash the eggs before they are shipped, because washed eggs are a little more likely to rot (there is a thin coating called the bloom on an egg when it is laid. The egg keeps better if the bloom is not washed off.)
Considering how expensive it is to ship anything, I would expect it to be cheaper to buy eggs at a local store for eating, instead of shipping them from one place to another. If there is something special about the eggs you produce, then of course that changes things about whether they are worth shipping or not.
Here is one example of a thread that talks about packing eggs for shipping:
https://www.backyardchickens.com/threads/a-great-method-for-shipping-hatching-eggs.1646627/
