Where do you guys get boxes for shipping eggs? The post office is on to me. I used to take the free priority mail boxes and turn them inside out. But now they have the inside covered with printing and I was told that the box would go at the one price shipping rate even if inside out, because it is recognizable as one of those boxes. If I have plain box and send eggs priority, it is slightly cheaper, so that I can send a bigger box and can get a tracking number and insurance for the same price as using the next size down one-price box without tracking number or insurance.