Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass

Graduation lines: there is white graduation lines on the glass bottles, marked every 50 ml, which is from 100ml to 400 ml, helping you make more accurate measurements

Screw cap: the blue screw cap can reduce the risk of liquid evaporation and exposure, made of polypropylene material, which is resistant to corrosion and high temperature, and the lid can be sterilized by high-pressure steam treatment at 140°C

Quality materials: the borosilicate glass has a nice fire resistance and nice strength, which also has no toxic side effects; Its thermal stability, water resistance, alkali resistance, and acid resistance are nicer than common glass