DURAN® Original GL laboratory bottles have become the gold standard of multifunctional laboratory bottles since their introduction in 1972. The protect safety-coated version of the bottles combining the best of both worlds: virtually inert USP/EP Type I borosilicate glass 3.3 glass on the inside and a protective safety plastic layer on the outside. The bottles are moulded from high-purity, ambered, glass that is then coated with a PU plastic coating to reduce the hazards of broken glass and liquid splashes in the event of breakage. The amber ensures that light sensitive contents are protected from the effects of photodegradation. The protection against ultra-violet light meets international USP/EP standards. A combination of high-performance materials and robust ISO 4796-1 design provides a long working life. The bottles feature an easy-to-read graduated volume scale, and marking field in permanent white enamel. Permanent Retrace Code on each bottle for manufacturing lot traceability. The protect safety coating meets the requirements of ASTM E1522, and is fully autoclavable at 121 or 134 °C.