Overpacks are larger containers into which a smaller one may be placed. We offer 4 different size overpacks: 95-gallon overpacks, 65-gallon overpacks, 30-gallon overpacks and 20-gallon overpacks. All our overpacks are certified for use as DOT salvage drums. They have the highest UN and DOT certifications available. They are made with high density polyethylene which offers chemical resistance to acids, caustics and corrosives. They comply with UN Packaging Group 1 (X-Rating) and are certified for use as DOT Salvage Drums, 49 CFR 173.3 (c).