(A terrific tutorial from the Just Bento forum!)

Furoshiki are a traditional Japanese wrapping cloth. They come in lots of sizes and are used for wrapping gifts, treasures, and bentos. As a bento wrapping they are extremely handy, because in addition to keeping your bento together (if you don't have a belt), and mopping up any small spills of wet stuff that may escape your box on the way to work, they transform into a small tablecloth or napkin when you unwrap your lunch.