Across the results the listed materials include fabric, polyester, MDF insert, PEVA (polyethylene vinyl acetate), and PVC (polyvinyl chloride).
Several lunch bags list insulated interiors or insulated linings to help keep food hot or cold. Many also note wipe-clean or wipeable linings/surfaces for easy cleanup.
Many storage cubes are foldable or collapsible and can be folded flat for storage. Lunch totes are soft-sided and packable, with top or padded handles and options to attach via a buckle, allowing them to fit into backpacks or be carried easily.
Most lunch bags and lunch boxes list a suggested age of 3 years and up. One listing specifies an age range of 3–9 years.
Most listings indicate no assembly is required; product descriptions and reviews note quick setup and that the boxes are ready to use right away.