I purcahsed the "flat out" food containers I am not impressed. They are very difficult to work with. They don't expand well. Then when you manage to open them and put food in them, you try to put the lid on, only to find that is when they flatten out. I wanted to exchange them for a different tupperware product. I called thier customer service number, only to be told that they don't do that when you purchase thier products at a party from a sales person and that maybe, "you can work something out with her." So the... read full review »