Amber PP, PP screw closure. Excellent chemical resistance to most acids, bases and alcohols. For storing chemicals and standards, collecting and storing distilled water. The 4 and 8 l sizes have built-in shoulder loop for attaching an identification tag. The 2 l comes without shoulder loop. Amber PP to help protect light-sensitive materials. Comply with U.S. Pharmacopoeia 23, 661 requirements for maximum allowable light transmission. Autoclavable, leakproof.