Octagonal-shaped ThermoSafe® Durable Transport Container is pre-qualified to hold 2-8°C refrigerated temperatures for up to 4 days under extreme ambient temperatures. PolarPack® Foam Brick refrigerants are loaded into sleeves to replace mechanical refrigeration, while foam-in-place urethane insulates polyethylene seamless shell. Able to hold bulk drums of liquid from 35-100 l, reusable container is suited for specimens, biologicals, and hazardous materials