Nicotine River Safety Coated Glass Reagent Bottle, with Blue Screw Cap. PVC-based plastisol coats exterior of bottle retaining contents if bottle accidentally breaks. The non-slip coating allows for greater ease and stability when handling wet or dry. Made from 3.3 borosilicate glass to help prevent changes in pH levels and maintain content purity. Bottles and Screw Caps can be autoclaved/sterilized.