DetailsModular has 4 different boxes, and a wrapping that has an integrated chopping board and that can be used to hold the boxes together. The sleeve can also be used as a placemat. Choose just what boxes you need, and effectively double your volume when you use all the boxes. The boxes are liquid tight, and can be packed away within each other to take less space when not in use. With these boxes you can pick and choose and build your lunchbox just how you need it for the day ahead.