This container is great if you want to take either two hot or two cold dishes, and the third will adapt to those temperatures. But if you want to mix it up more than that, you're out of luck. The thermal zone consists of two containers and those will both gravitate to the same temperature, so forget about mixing hot and cold together.
For example, if you want, let's say, hot soup, and sandwich, and yogurt for dessert, this isn't really going to work. The soup has to go on the bottom and the sandwich, or whatever other dish, will have to stay in the same zone, so it too will warm up. In the top container, the yogurt will not stay cold, it will gravitate toward the ambient temperature of the whole container within a couple hours and settle close to room temperature. I think the claims that there is barrier between the two zones isn't proven here. It's also very unfortunate that they don't allow you to stack the containers in any order you want to create your own zones. They only stack one way -hot/cold zone, and side dish on top.
Also, the liquid container is too small to hold a decent hot meal, and the middle container doesn't seal at all. I took hot chili and used the middle container because it is bigger and can hold enough for about two cups of chili. Both times, it leaked out the lid and made a big mess in the container. I'm not sure why they wouldn't have that container seal like the other two, kind of illogical to me.
I also don't agree that this thing keeps food hot for several hours. I have had to warm up my food several times after opening just 5 hours later. I work inside, but my trip to work requires about 15 minutes total ouside in the cold, with this thing sealed up in my backpack.
If you're considering paying a considerable amount for this container, you need to think about these things. Perhaps some other brands will offer better performance and more rational design.