Which best states the central idea of the following passage?
Lunchtime can be fun and healthy with a bento box, which is the Japanese equivalent of a lunch box. A traditional bento box holds nutritious portions of rice, protein, and vegetables, usually in a flat container divided into sections, and is readily available in many places throughout Japan. Additionally, many Japanese homemakers spend time and energy on carefully preparing bento boxes for their families. Sometimes, bento boxes are elaborately arranged in a style called kyaraben , or "character bento," in which foods are decorated to look like characters from Japanese pop culture.