Our Glassco glass wide mouth, square-shaped, media bottles have large openings that enable the easy storage and transfer of substances. Every bottle is autoclavable and comes with permanent white easy-to-read printed graduations and marking spots. The supplied GL80 (GL45 for 250ml) cap is linerless, and both the cap and drip-free ring are polypropylene and autoclavable to 140°C. Maximum use temperature of bottles is 450°C.