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 concave?
Document: I haven't used it yet and I am sure it will work well at melting butter, but my problem with it is that the bottom is too small around to sit well on my gas stove. It would be fine on electric or flat surface, but it is hard to get it balanced on the one I have so that it doesn't tip over. I am thinking that I will probably have to hold the handle while I am using it to be sure it doesn't tip.
The pot does not feel very heavy. I have read reviews that said it was tipsy when empty but I have yet to experience that yet (it feels solidly balanced on a flat surface). I do not like the exposed screw in the handle, but that is also probably to keep the cost low.
Nice little pan......doesn't fit the burner on the flat surface even on low, but it is still nice. Just make sure pot is sitting sortof on the side of the burner and not the middle or you might mess up the handle. Made very well and the blackspot you see on the picture is nothing....no black spot on pan.
We have a smaller gas stove and it wobbles on the burners. It's also difficult even with the flames turned way down to get the flames under the pan rather than just around the pan. If not for this I'd given it a much higher rating, but you want the flames under the pot, not around the sides. If on an electric stove, or flat top range it'd probably be perfect, but if you have a gas stove be aware of this.
The handle could also be fitted just a tad better.Follow up:  after using this a relatively short time, I am downgrading the review. The pot has black lines on the inside, suggesting that there are two different metals and one is already losing its integrity. It also tips over very easily, not sure why, but it is very difficult to keep it perfectly upright on the gas burner. A flat top stove may obviate that risk, but it is wobbly.
This is exactly the size of pot I have been looking for for heating water for a cup of coffee, melting butter, etc. Good quality, heavy bottom, heats up quickly.
I love this little pot. So versatile for small portions. I even make oatmeal in it and eat out of it. It feels really heavy since the bottom seems to weigh in as most of the weight. Love the shape and the handle nice. There is no lid with it ... just as a reminder.
Does just what I need, heats small amounts of sauces and melts butter and cheese without having to fool with a large pot. The extra-heavy steel bottom assures even and, if you do it right, slow heating. I'm sorry I haven't had one of these for a long time.
I bought this pot in desperation, looking for something smaller than a 1-quart saucepan to cook small portions in. I was a bit skeptical since it's supposedly a butter warmer and has a funky shape, but it is perfect.This is a very heavy and sturdy pot. I thought it would be delicate because it is small, but it has a very thick and heavy bottom that keeps it well-balanced on the stove.
The size of this little pan is exactly the size I was looking for. But, unfortunately, it looks like it's a "second" because the bottom, on the inside, has a lot of tiny bumps. All of my cookware is stainless steel and not one pot or pan has ever had anything like this. I returned it and requested a replacement, in the hopes that I had just gotten a defective pan. Amazon had the replacement in my hands within two days.
Answer: bottom is flat.