This 4 Liter secondary container is recommended for use as secondary containment of bottles and Safety Waste Systems during transport use or storage. WARNING! Do not use with radioisotopes. Material: low-density polyethylene. Outer diameter x height: 7-1/4 x 9-3/4 inches (180 x 250mm).Capacity: 4 Liter. Sold individually. Nalgene #: 6377-0004.