Beakers are containers used by chemists, researchers, and educators to measure, mix, analyze, transport, and heat substances in a variety of laboratory, educational, and life science applications. Beakers are commonly made of glass such as borosilicate, and can also be made of stainless steel, or plastic materials such as polytetrafluoroethylene (PTFE), polypropylene, or polyethylene. Material types are chosen for their chemical, heat, and corrosion resistance, and for their surface finish, clarity, and non-contaminating abilities. Beaker forms commonly include Griffin (low overall height), Berzelius (a high form), or a shallow and wide structure, which is used for liquid crystallization. A beaker's outer diameter (OD) measurement does not include the rim. Beakers can meet ASTM E-960 specifications for classification, design, capacity and dimensions, and markings."p"Branson Ultrasonics Corporation manufactures ultrasonic cleaners, cell disrupters, and equipment for welding and plastics joining. The company, a subsidiary of Emerson Electric Company, was founded in 1946 and is headquartered in Danbury, CT.