Amazon.com: 100ml Borosilicate Glass Amber Graduated Reagent Bottle . This series of amber Reagent bottle is made of borosilicate glass, with orange color GL45 cap, includes 100ml, 250ml, 500ml, 1000ml, 2000ml,3000ml,5000ml,10L,20L 1.The cap is made of PP, the max autoclavable temperature is 140 . 2. GL 45 screw cap is a