I saw these adorable broken eggs cupcakes that were placed in paper egg cartons I think they were on the hello cupcake blog. I have a question.. how can you clean those cartons so they would be safe for food use? I know eggs are sterilized but what about the container. maybe the foam cartons could be washed but not the paper ones. or maybe they bought unused and new containers. hey I am answering my own questions

Maybe line each one with a bit of tissue paper? Or wax/parchment paper? You would be able to see it probably but might be a cute effect.

Someone just did these, they are in most saved.

https://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1773703
If you look closely, you can see they are in liners.
Here's another. http://blog.myplainview.com/lindadrake/files/2010/05/100_2203.jpg

You can buy unused paper egg cartons from Tractor Suppy Store.

A farmers co-op has them also!

I checked on line and saw few places that sell new egg containers. personally I rather buy new cartons. I wouldn't use a paper one and I will wash and disinfect the heck out of the styrofoam one!! Well that is just my germaphob part speaking