Originally Posted by onesnowyowl

In Europe milk typically comes packed in a Tetra Pak, which is aseptic packaging, like what soy milk comes in here. Packaging it this way makes it shelf-stable. A couple of companies have tried selling shelf-stable milk in the United States, but it seems that American consumers can't get over the idea that milk should be refrigerated.

As for eggs, I don't know for sure, but I would guess it has something to do with our fear of contracting salmonella from said eggs (specifically salmonella enterica), despite the fact that the odds of contracting salmonella from eggs is very low (only 1 in every 30,000 is suspected to have salmonella).