This Wheaton dropping bottle has a natural LDPE body and a screw neck opening that accommodates standard-sized dropper tips and threaded caps (sold separately). This dropping bottle is used to dispense liquids in a unit of a drop in a dropping motion. The LDPE (low-density polyethylene) body is lightweight, flexible, and elastic, has an opaque hue, and resists impact, stress cracks, and moisture absorption. 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 has a screw neck opening that accommodates standard-sized dropper tips and threaded caps (sold separately). This dropping bottle is suitable for use in many biotech, diagnostic, and pharmaceutical dispensing applications.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.