When I decided to get ducks, my family started collecting egg cartons. Today I put a dozen duck eggs into one of those paper mache cartons and the lid wouldn't close even halfway. The eggs were crammed into those little cups with their sides pressed together. I guess I need to find someone local with chickens and give all those egg cartons away. It's a good thing I took advantage of a sale to buy an entire case of duck egg cartons. The eggs fit in those.