Amber glass reagent bottles with hood stopper are made from Wheaton 33 borosilicate glass which helps prevent changes in pH levels and maintain content purity. Amber colored glass protects light-sensitive samples during storage. Features no-drip pour lip for easy pouring of contents. Octagon-shaped round glass stopper fits securely to prevent contamination. Narrow mouth with ground glass stopper is ideal liquids. Ideal for shelf storage. 250mL Capacity. 145 H x 72mm Diameter. Amber. Borosilicate Glass. 19/26 Stopper Size. Wheaton #: 215257.