The Stackable Bamboo Fiber Bento Box includes two food storage containers that feature built-in utensil storage between the layers. This trendy bento box uses bamboo to help cut down on plastic usage which benefits the environment. Material: Bamboo Fiber and Polypropylene Trendy bamboo design Two food storage containers Built-in utensil storage Through a partnership with 1% For The Planet, one percent of sales of all EcoSmart® products are donated to environmental nonprofits. Due to the nature of the wood material, variations in laser imprinting quality may occur.