Polysulfone Dilution Bottles with Polypropylene Screw Closures. Transparent, excellent resistance to weak acids, bases and all aqueous solutions. With useful temperature range of -100°C to +165°C. Autoclavable, but when used with Tween will reduce the life of the bottle. Accurate to ± 1 mL. NALGENE® dilution bottles comply with dilution methodology described in Standard Methods for the Examination of Water and Wastewater (18th Ed.) and Standard Methods for the Examination of Dairy Products (15th Ed.), as well as other professional standards.