Cardboard egg cartons, 30 pieces. I used to throw these away, but I learned that some people reuse them for things like raising insects, so I decided to list them. I thought they might be needed for the summer ( ^∇^ ) If you're willing to pay for shipping... I think 400 yen would be a good price. I can change the price if you'd like. Please contact me. Color: Gray If you have any questions, please send me a message.