Four types of Shinkansen bento box containers: 0 Series Shinkansen E8 Series Yamagata Shinkansen E6 Series Akita Shinkansen Kyushu Shinkansen They are not airtight, so you need to be a little careful when taking them outside. However, I think children would be delighted if you put their food in these containers at home. There are some minor scratches from washing with a sponge, but no noticeable large scratches. I would like to sell these to someone who understands that they are used bento boxes.