I have on this listing a Used KELLY...Sister Of Barbie lunch box.  It is made from Thermos. And dated 1996.  Mattel.
I found the lunch boxes at a farmers garage sale.  It was in a box and we very dirty.  He said he forgot he had them but needed to not keep them because he was moving into an assisted living apartment.  Everything had to go.  Like I said it was in bad condition..layers of bird you know what, dirt, straw, and wrapped in old news papers dated back in 1995.  It did wash up nicely though even with Dawn dish soap and a little elbow grease.  I will go over them again when they are sold.  I will try my best to remove what I can without further damaging the interior or exterior of the piece.  There is still residue from masking tape or stickers on it yet.  That too will come off with a little work.  But you are buying them as shown in the photos.  
The front photo of the lunch box looks ok.  Some water marks and the label is lifting up (but can be glued back down) … not bad for this piece being Vintage  Like I said...check out the photos as they are part of my description.  The clasp works great.

I will be listing the other kids lunch boxes found at this farmers sale very soon too....check them out.