Although this is labeled as a bento box, it's actually a tiffin. Unlike traditional tiffins which are usually light stackable water tight metal containers, this is a hard, colorful, heavy container which is not water tight. Also make note that you can NOT microwave this container.
Specifics: It has three compartments which can be latched together with the metal closure on top. The compartments are interchangeable; if you want the red on top, pink in the middle, etc. The orange and red compartments are the same size with no dividers. The smaller pink compartment is divided into three sections, 2 small squares on one side, and one rectangle on the other side. Unless you are eating sumo porportions, this lunch kit is probably too big for most (the company does make a smaller round version, which is probably good enough for most adults). I usually pack breakfast, lunch, and snacks for the entire day. Since the top of the container has a slightly convex construction, I've found that if I move one of squares from the bottom to the top, I can fit a mini water bottle into it. Regular capri sun or juice boxes can fit with ease into any compartment. Since I cannot microwave the container, and it is not water tight, I've found that I can still pack soups or liquids in small plastic containers and then of course remove them from the kit to microwave. When fully packed, this container is like lifting some light arm weights and when I walk to my car at night I figure if anyone comes after me, swinging it at them will definently leave a mark, so if you want a light toss it in your bag container, this isn't it. Other than the few negatives, this is a great sturdy kit which often gets compliments and ooos and ahhs when you pull it out on a lunch break.