Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Is the bottom of this pot flat or is it concave; higher in the center than the sides?  I would think it should be flat.
Document: One click -oh I think I need another! !
I would love a third pot, but that would just let me be lazy and not wash the first two for another day!
Purchased this to go w/my IP DUO 7 in 1 unit; I love it! I can get another dish cooked/prepped when/if i have leftovers in the other pot. No more worrying about teflon/aluminum flaking off into our food and contributing to Alzheimer's. So easy to clean afterwards, and very convenient. Don't think about it -- purchase a 2nd pot!
I purchased the Instant Pot 6 in one electric pressure cooker and love it. You can do so much with this electric pressure cooker that I needed two inner pots to remove one and start cooking with another. For instance I would pressure cook some beef in one pot for 30 minutes and take one inner pot out, replace with another inner pot for rice to cook in 10 minutes.
I purchased this for my Emeril and Cuisinart pressure cookers as many are concerned about the healthiness of using the non stick pots included with the electric pressure cookers. YOU DON'T HAVE TO GO BUY A WHOLE NEW PRESSURE COOKER!! !Just replace the pot!! !This is excellent quality with the tri-ply bottom - even pasta does not stick!
I am very very happy. Thank you very much Instant Pot for a job very well done!Update: 10-24-2013I tried to cook some bean soup using the Instant Pot's Stainless Steel pot in my Cuisinart Electric pressure cooker this evening. However, I ran into a bit of glitch. I previously stated that the pot fit my Cuisinart peeeeeerfectly, but unfortunately the height of the pot is about 2mm too short. You would not know this unless you try using your Cuisinart pressure cooker with this pot.
Does all that was expected. Very easy to clean and switch would buy againFor easier use  use a spray on such as pam
It's a great, solid bowl, just like the original. Whether you are making several things at once or storing a batch of something in the bowl and want to use the InstantPot again or letting one bowl soak because you burned stuff on the bottom, it's great to have a second bowl handy.
I highly recommend this item, especially with the purchase of an Instant Pot. Then you can have a cook-a-thon as well!
I am in love with the Instant Pot in general, but it is great having another bowl. Nice to swap out between the two to create a complete dinner.
Answer: About a month ago, I bought the new 7-function Instant Pot and an extra inner pot--both have a concave bottom. It is my one complaint about the appliance. When you use the sauté function, the oils pools around the sides, rather than being evenly distributed across the bottom. My SIL has an older model, and as I recall, it has a flat bottom.