The media bottle is mainly made of borosilicate glass, with fire resistance, thermal stability, water resistance, alkali resistance, acid resistance and other properties, good strength, not easy to break, can be applied for a long time. The amber colored glass absorbs UV wavelengths and protects light sensitive solutions. An orange GL45 screw cap ensure an airtight seal. Features a drip free pouring ring. Both screw cap and pouring ring are autoclavable for easy sterilization. The Bottle features white graduation lines marked.