Maximum use temperature of bottles is 450°C. Get Price. chemistry GL45 square media bottles with screw cap. Amazon.com: PYREX Square Media Storage Bottle Laboratory bottle DURAN, GL45, 500 ml, clear glass & square, with . Laboratory bottle DURAN, GL45, 500 ml, clear glass & square, with cap and pouring ring. Manufacturer: SCAT. item no.: SC501115.