PP, PP screw closure. 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 bottle is without shoulder loop. Low in trace metals. Good for freezer storage to - 100 °C. Excellent chemical resistance to most acids, bases and alcohols. Leakproof. Autoclavable. PP, PP screw closure. 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 bottle is without shoulder loop. Low in trace metals. Good for freezer storage to - 100 °C. Excellent chemical resistance to most acids, bases and alcohols. Leakproof. Autoclavable.