A.V.
I read the reviews and they are great for me too!! I would suggest using thermos ($15 at Target). Yes, its expensive--look for them when they go on sale, but I found I was able to be more creative once I had one. Worth every penny. My daughter was able to have different kinds of soups, Mac and Cheese and leftover dinners. Plus nothing beats having a hot lunch on a cold day, especially when you live in Minnesota!! :)
We can even use it for hot cocoa! :)