Manufactured from heat resistant, durable borosilicate glass with thick walls and crush-resistant corners. Thick wall, heavy base and reinforced rim prevent breakage during washing and transportation. These impact resistant, excellently thermal stable bottles are autoclavable at 121°C. Caps should not be closed during autoclaving. Angled neck form allows unrestricted liquid flow out without leaving any residue at the bottle neck. A large GL 45 bottle neck provides easy filling and pouring. Unique design pouring ring prevents drops and spillage. Caps are made from polypropylene with large ridges with increased grip. Cap inner design ensures hermetical and leakproof closure. Volume graduations on wall side offers better liquid level viewing and reproducable filling of the bottle without the need of a cylinder. Volume graduations and inscriptions are printed with white enamel.