Glass bottles are commonly used in laboratories to contain and store liquids like water, reagents, media and solids like laboratory chemical powders. Glass bottles are preferred for storage of chemicals due to its inert nature. The glass will not react with the chemicals and compromise with the integrity. Reagent bottles of different volume capacities are used to store chemicals. They openings of these bottles can be secured with a cork, which is also made of glass. Amber glass is darkened glass, which prevents the contents from being exposed to ultraviolet and infrared radiation. It is used for the storage of light-sensitive chemicals. Glass bottles are manufactured with both plastic screw caps and glass corks. In case the reagent to be stored is corrosive, glass corks are preferred. Wash bottles are also prepared using glass. Glass aspirator bottles which are used in techniques like chromatography can be used to store wash buffers and other reagents, which can be directly aspirated from the container.