This is going back to the lunch box discussion...
I did not like the laptop lunch box at all. I thought the lids were very difficult to get opened AND closed even for my 7 year old. When I used the containers with out lids it made a mess with a lot of what I packed (and they only give you 1 lid. Just wasn't for me.
So I got the round 2 tiered stainless steel "bento" box (forgot the brand name) that comes with cool bamboo flatware in a handy case. My dd loves this, but as she is a food "seperatist"
I found myself putting things into wax bags and then shoving them in the container. I now use it more for myself (it's great for a salad and some dry snacks) or outings other than school.
So what do I use now? I sewed up some cute lunch totes. Non-insulated, made a pocket on front, very simple. Put most things in pyrex glass containers, still use wax paper bags when needed (but recycle them until they tear) It really works the best for us, haven't had a problem with insulation so far. Cheap, easy. One of the totes I even made with the lining of an old raincoat, so now the inside is waterproof!
After spending almost 60$ on "green" lunch totes, it was a real eye opener for me about being conscience of buying at all, green or not.