The Rubbermaid 1813501 Lunch Blox medium durable bag - Black Etch is an insluated lunch bag designed to work with the Rubbermaid Lunch Blox food storage container system. The bag is insulated to achieve the maximum benefit of Blue Ice blocks and keep your food cold. The bag features a bottle holder, side pocket, comfort-grip handle and removable shoulder strap. The lunch Blox bag is durable and looks good for both the professional bringing their lunch to work or the kid taking their lunch to school.