This amber HDPE 125mL (4 ounce) wide-mouth bottle with an amber polypropylene screw closure reduces UV light transmission to protect and prolong the life of light-sensitive materials. Complies with U.S. Pharmacopoeia 23 requirements for maximum light transmission. Thinner-walled and more flexible than the Nalgene Lab Quality bottle but still guaranteed leakproof. Wide-mouth is easy to fill with dry materials or liquids. Excellent chemical resistance to most acids bases and alcohols. Material: amber high-density polypropylene (HDPE) with an amber polypropylene screw closure. Capacity: 125mL (4 ounce). Closure size: 38mm. Sold only by the case. Nalgene #: DS2085-0004.