The inexpensive plastic egg carton really does protect eggs for camping. You can even carry them in a pack safely.
Coghlan’s is a brand that is known for inexpensive camping gadgets. Many of them don’t work very well, but these egg boxes are definitely worth buying. This one is harder to find; it’s for 6 eggs. You can most often find the one for a full dozen eggs. It’s basically the same just twice the size. Mine happens to be red, but I don’t think the colors are consistent with the sizes.
These are made from semi-rigid plastic, and simply snap closed. You use the handles for leverage to pull the case back open.
If you look closely at the picture you can see that the cups on one side of the case have little tabs. If you put the small end of the egg in that side the eggs will be held fairly tightly in the case so they don’t rattle.
I have actually carried eggs in my backpack in this for a couple of days. (They don’t go bad in that amount of time.) I doubt that you could drop this on a sidewalk without damage to the eggs, but it offers a lot more protection than even a styrofoam egg carton.
Although this is something you wouldn’t usually want the weight of for backpacking, it’s not unreasonable if you really want eggs. The weight is 3.2 ounces.
Because it is smooth plastic it cleans up easily, but I don’t know if it is dishwasher safe.
The drawbacks are:
You must open it somewhat carefully or the eggs might fall out.
The handles, tabs, and hinge are the weakest portions and take a lot of abuse if it is used often... on the other hand, it didn’t cost a lot to start with!