This Wheaton Boston round serum bottle has a borosilicate glass body and an aluminum seal neck finish, and it is autoclavable. This serum bottle is used to hold liquid contents that require protection from contaminants. The bottle's borosilicate glass body provides chemical, thermal expansion, shock, and heat resistance. Its Boston round shape is used for applications that require a rounded body, short neck, and narrow mouth to store liquid samples, solvents, and chemicals, and dry materials. This bottle's neck is designed to accommodate a crimped aluminum seal or a standard-sized stopper (both sold separately. The bottle is autoclavable for applications requiring sterility. The borosilicate glass conforms to United States Pharmacopoeia (USP) Type I requirements for glass containers. The large-capacity bottles (250 mL and 500 mL) have raised milliliter (mL) graduations for location, and for measured dispensing and storing applications. This lab bottle is suitable for use in freeze drying and storage of distilled water, reagents, vaccines, blood plasma, sterile culture media, chromatography samples, and serums.Lab bottles are used to store, hold, and mix liquids, powders, and other substances in a wide variety of scientific industries. Lab bottles have a more pronounced neck and shoulder than jars. Lab bottles are manufactured with a combination of characteristics in order to meet the demands of particular applications, such as for solution dispensing, mixing, and weighing, and use in centrifuge operations. They come in many shapes for specific applications, with a variety of mouth or nozzle shapes and sizes for specific use. Lab bottles are made from materials, such as glass (borosilicate or soda-lime) and an array of plastics, which are selected for chemical and thermal expansion resistance, transparency, and their adaptability in a variety of applications. Lab bottle interiors, caps, and lids are often lined with a protective material. Caps and lids help seal bottles to prevent solutions from spilling. The capacity refers to the fluid amount held by a lab bottle, and is commonly measured in milliliters (mL) and liters (l), and sometimes in ounces (oz). Lab bottles are suitable for use in chemistry and biology applications, as well as in pharmaceutical and scientific testing. Wheaton Industries Inc. manufactures and repackages laboratory ware, instrumentation, containers, and associated products under the brands Wheaton Science Products and Wheaton Science Packaging. The company, founded in 1888 and headquartered in Millville, NJ, meets International Organization for Standardization (ISO) 9001/2008 and 14001/2004 standards.