Borosilicate Glass Graduated Amber Reagent Bottle autoclavable with Screw Cap GL45 100ml,250ml,500ml,1000ml,5000ml,10L,20L (100ml) - Gl 45 screw cap is a standard joint. Part 3. Production Discription. This Amber Reagent Bottle is made from borosilicate glass and is great for containing liquids and powders that are light sensitive.