Exactly what kind of bento box
http://web-japan.org/kidsweb/virtual/bento/box.html do you require!
It's so sad that Souen (not Suen, as in the author of children's books, Anastasia Suen)
http://www.souen.net/ is no longer providing bento boxes to their customers!
Perhaps if you return some of the bento boxes that you've collected, cleaned up and allow them time to wash and dry them for you before serving you your meal in them, you can continue to be served macrobiotic meals in bento boxes at Souen!
Or if you and Souen have no bento boxes, then you might consider getting the 555 stainless steel lunchboxes
http://www.asianawest.com/mulstainstee.html from your local Chinese supermarket.
I've been using them for years and a broccoli rubber band works wonders once the hinges start to loosen.
Just slide into a plastic non-porous produce bag to protect the other items in your purse or backpack, and you are all set.
Thank you, very much.
Bruce Paine