Small items can be put in containers of a small dimension (called butter box) enabling to grasp pieces without catching on the edges. It is possible to put 12 butter boxes in a 400 x 600 x 75 container which simplifies the transport from the supplier and avoids to repackaging. These small boxes can also have a Kanban tag.
A lid (L 124) covers all container sizes (one 400x 600 or two 400 x 300 or four 200 x 300). Two notches enable strapping the Rollis®, so it is easy to make piles of Rollis transportable by truck. This cover can be stacked. It is possible to put a bigger container on top, and thus using all box sizes together.