Does it matter how you place your egg in the carton? Yes, it does and here’s why.
Eggs are not completely filled on the inside. If you crack open a hard-boiled egg you see there’s a pocket of air on the wide end of the egg, called the albumen. That pocket of air allows for the presence and reproduction of bacteria. The trick is to keep that bacteria away from the yolk, which is more susceptible to bacterial infection. Albumen contains bacteria killing enzymes while the yolk does not. If you hold the egg wide end down, the air pocket will rise enough to reach the yolk. By storing eggs wide end up, the pocket of air stays away from the yolk, and the eggs stay fresh longer.
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