Manufactured from borosilicate glass 3.3 which is resistant to heat and almost all chemicals. Autoclavable at 121°C and 1.1 bar for 30 minutes. Caps should not be closed during autoclaving process. GL 45 bottle neck provides easy filling and pouring. Pouring ring prevents drops and liquid splash. Cap is made from polypropylene with large ridges for increased grip. The angled finishing allows the liquid to flow without any restrictions. Inscriptions are in white enamel which are specially designed for glass.