This vintage lot of 5 150ml Short Neck Flat Bottom Boiling Flasks is a great addition to any laboratory glassware collection. These flasks are perfect for conducting experiments and are made of high-quality glass that ensures durability and long-lasting use. The flasks have a flat bottom design that provides a stable base for the experiment. The short neck design allows for easy pouring and filling, making it convenient to use. These flasks are ideal for medical, lab, and dental procedures and are also suitable for use in business and industrial settings. These pieces in particular were used in a municipal water treatment facility.