Lab pack and overpack drums are constructed of tough, chemical resistant high-density polyethylene, are lightweight and are nestable and include UV inhibitors. The containers incinerate completely. Lab Pack Drums have screw top and are ideal for the storage, transportation, clean up, and spill containment of small containers. Overpacks are heavy duty and are ideal for the storage, transportation, clean-up, and spill containment of larger containers. UN certified to HM-181.