Instruction: Answer the given question using the supporting document.

Input:
Question: is the steaming tray aluminum or stainless steel?
Document: Three stars because its not stainless steel bowl you cook in its tin works great an its beautiful good price
This is my first rice cooker, and I absolutely love it!It came with simple directions and a steaming tray. We use it all the time, I'd recommend it to anyone!
The included steaming tray is a nice touch as it allows me to throw some vegetables in with my dinner.I think this is a good little machine for a college dorm and would highly recommend it.
I love it, this rice cooker is very pretty and works very well, I bought it two months ago but I have never used the &#34;steaming tray&#34;
It has taken a bit of time to figure out how to cook decent rice with this, but it still burns any second batches that I decide to make. I have not tried to use the steaming tray.Overall, definitely not worth the money.
We bought this to replace an older Black & Decker plastic steamer. The thing I hated about the Black & Decker was that the rice always stuck to the plastic steaming tray, and clean up was a royal pain. This steamer's rice holder is metallic, and features a non stick coating. Clean up is very easy. For the price, this is a great steamer.
..was a replacement for one I lost when my apartment burned down. I knew exactly which unit to look for on Amazon. This product produces the best rice each and every time, is easy to use, clean and store. It has plenty of capacity, and allows one to cook a complete meal, if required, with the steaming tray on top. Very efficient.
I wanted something small, portable, beautiful, and works well...this item met all that! I love it so much I've been using it every today. Love the steam tray that it comes with, great for steaming veggies while the rice is cooking underneath. Love love this little gadget. Highly recommend for 1-4 ppl cooking.
Overall I'm satisfied with this purchase. However, I gave it four stars because:Pros:  Automatically switches from cook to warm when rice is done. Cooks rice within 20-30 minutes. Can steam food in the steaming tray after rice has cooked. Compact enough from 1-4 people.Cons:  No On/Off button. Must plug or unplug in order to use or shut off (not convenient).
I bought this for a friend for Christmas a year or so ago and discovered a few months ago that she never used it. So, I immediately confiscated it. If you measure appropriately and put in the recommended amounts of water and rice, I'm not sure how it could go wrong. It cooks perfectly for me every time and if I forget about it, that's ok because it will turn off cooking mode and turn to warming mode when it's done cooking. The steaming tray needs no explanation.
Answer: Aluminum