The Qorpak narrow-mouth cylindrical bottle has a clear PVC body and a screw neck opening that accommodates standard-sized threaded caps. This lab bottle has a narrow mouth for substance control and containment. The PVC (polyvinylchloride) body provides flexibility, dimensional stability, flame resistance, and mechanical strength. Its cylindrical shape is used for a wide variety of applications that require solution containment. This lab bottle has a screw neck opening that accommodates standard-sized threaded caps (sold separately). This bottle is suitable for use in general purpose mixing, storing, and sampling 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.Qorpak manufactures glass and plastic labware and fiberboard shipping supplies for fluid containment and transfer in the pharmaceutical, chemical, petroleum, environmental, and educational fields. The company is headquartered in Bridgeville, PA.