Bonar Plastics Polar insulated containers set the standard in durable insulated containers/carts for reducing distribution cost of temperature sensitive products. Sizes range from (2) to (57) cubic feet, and available with and without casters. Bonar Plastics also manufacturers single wall containers, freezer pallets and many other containers for in plant use. Come check out our new line of small modular insulated coolers. 1/8, 1/4, 1/2 totes.