In the fridge, the egg lasted six months before it cracked and got thrown out.

WSJ: Big Chocolate Eggs May Be Big, but Big Hen's Eggs Not So Much

Frist sealed the egg in a plastic bag and stuck it in her fridge.

WSJ: Big Chocolate Eggs May Be Big, but Big Hen's Eggs Not So Much

Chill in the fridge and once cool, continue with the egg whites.

FORBES: LIVING HIGH ON THE (EGG) NOG