Hi everyone, I have some shipped and local eggs coming in a few weeks and I want to use a carton for the shipped eggs at least. My husband got me a washable carton from work that has plenty of ventilation. 2 questions: any reason not to use plastic and how would you lay the eggs? Straight up and down or at an angle? Non fertilized eggs...egg on left is at an angle but secure and on the right is up and down. Thank you!!