Bento Box 3pc Storage Container Set Assorted Colors. The Bento Box 3pc Set comes with a small, medium, and large container, each with a window on its lid to help keep tabs on the contents. Weâ??ve added structured sides for shape, and for spills, weâ??ve lined each of the compartments with high-grade, waterproof, wipeable material. To keep you stylish, weâ??ve also chosen three brilliant colors for a bold set.