I went to Marukai 98 cents store on Hawthorne Blvd in Torrance. And found myself ended up walking out from the store with the purchase of two different types of dish container for bento box. The oval shape are silicon material dish containers which the colorful round shape dish containers are paper with plastic coated material.  The paper cup comes in 20 pieces.

Both sold for $1.50 plus sales tax each. I like the silicon dish as they are easy to wash and very flexible. I haven’t try using the small round container yet, but will only use it if I have dips or sauce to put into the bento box.