This product features high heat retention thanks to natural bamboo with a transparent coating that brings out its natural color. Warning! When putting liquids in this lunch box, always use a plastic wrap. Material: Natural bamboo, urethane coating Dimensions: 12 x 12 x 10.7 cm Capacity: 400ml x 2 (full) #UrushiNoSato Urushi (lacquer) Lacquerware Wooden lacquerware Note: This is a sample image, so the actual product may vary slightly in color, wood grain, and shape.