These all-purpose round bottles have wide mouths for easy filling. They're leakproof and durable for long-term use and are ideal for storing, shipping and packaging liquids. Bottles are available in three different material types. High-density polyethylene (HDPE) bottles are for general use and can be used with most corrosives. Choose opaque amber-colored bottles for protection of light-sensitive material. Amber bottles comply with U.S. Pharmacopoeia XXIII requirements for maximum light transmission.