Borosilicate Glass Bottle is thick, tough, high quality, reduce UV light, low coefficients of thermal expansion, resistant to thermal shock, high chemical resistance in corrosive environments.Bottle up to 120℃, reusable, easy labeling. Glass bottles fit for storage of media, biologicals and other liquid solutions for lab, experiment, chemistry, scientific studies. Graduation:permanent white enamel graduations. High chemical resistance in corrosive environments. Glass bottles fit for storage of media, biologicals and other liquid solutions for lab.Manufactured from borosilicate glass which provides the best chemical resistance, low coefficients of thermal expansion, resistant to thermal shock. Graduated and comes with a leak proof screw cap, all reagent bottles have permanent, white enamel graduations for volume measurement and a white identification box for marking or coding.nuine borosilicate glass Reagent Bottle having very low coefficients of thermal expansion & resistant to thermal shock.Genuine borosilicate glass Reagent Bottle having very low coefficients of thermal expansion & resistant to thermal shock. Borosilicate Glass beakers are ideal for all clinical, research and educational purposes. It is manufactured with high-quality borosilicate glass 3.3 and comes with graduations and spout.