The Laptop Lunch bento box is like a closet organizer for your lunch. It measures about 6x8" and is only about 2" tall.
For Z's lunchbox, we pack two of the four main inner containers with her lunch for the day and two of them with her snack for the day. For the snack, we use the larger container that has a lid, and put a little piece of labeled wax paper over one of the smaller ones. These go "in back," and Z seems to play by the rules here. She has daycare folks managing her food consumption so it's up to them to make sure she doesn't get her yogurt and fruit (or some similar snack item) before naptime instead of her lunch.
We also like the Laptop Lunch System because it encourages us to pack well-balanced meals and present them attractively.