DURAN® Original GL 45 Laboratory Bottle, amber, without screw cap, 5000 mL. with DIN 168-1 thread USP/EP (3.2.1) light transmission graduated. See all 15 items in this product family. Standardised GL-thread and matching cap system for practicularly tight . Folin & Ciocalteu'S pHenol Reagent, Pure, Fisher Chemical 500mL, Amber glass bottle