Instruction: Answer the given question using the supporting document.

Input:
Question: Do the two top containers have steel on the outside and do they keep the food warm?
Document: Purchased as a gift for my son. He enjoys packing his lunch for school. I was under the impression it would have 4 containers, two with larger serving sizes but when I actually received it the larger plastic container nests inside the blue stainless steel container. Disappointed yes...I really can't complain overall it works well for me (50 and growing out instead of up), my son is 6'2&#34; and a growing teen.
I need a bigger one, but it can help me keep my rice. But the two boxes are very small, I don't like them.
This is a great product. The bottom compartment is really for rice, but you can put any hot food in it, though I've never tried it with soup. It really keeps the food warm.The only surprise was that the product was delivered with instructions in Japanese.
I've had the same mini Bento lunch jar for over 3 years. It worked EXTREMELY well. It kept the food warm/hot for hours. I finally decided that it was time to get a new one.The main container is much smaller than the mini Bento lunch jar I currently have. While I like the new carrier (bag) that came with the different components, this is really decided for someone much younger - toddler/little kid.
This is a child size. Let me put it this way, if I filled up each of the three containers 5 times I would still be hungry. Spend the money and buy a real one. Unless you have a child that's 10 or under, then you might only have to fill it up twice for him/her. Oh, and if you speak English and only English don't plan on reading the directions, although it does come with two languages neither of them are English.
It was a smaller than expected. But since we are using it for our baby, it's just nice.. We tested how long the hotness can last using normal hot water. It surprised us as it remained hot for abt 5-6 hours before slowly turning warm. By the end of 7-8 hours, the water was warm enough to make milk. That's very amazing. The only deficit it has is that it's not leak proof.
a great way to pack your own lunch,  excellent quality all around. I plan to buy at least one more just to rotated through (possibly a bigger one)
Overall, I'm very happy with this product. I would recommend it for both adults and children.
Major leaking. Not up to the task of yogurt - so it can't be up to the task of more liquid items.
I would give 5 star if the thermos conteinor was little bit bigger. But overall a great gift and smart idea!
Answer: Two small containers (with fruit in the picture) are plastic, with plastic lids. They don't keep the temperature. The big one (with rice) is plastic too but goes into steel outer container and keeps food hot or cold.