Florence flask
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A Florence flask/boiling flask is a type of flask used as an item of laboratory glassware and is named after the city Florence.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It is used as a container to hold liquids. A Florence flask has a round body, a long neck, and often a flat bottom. It is designed for uniform heating, boiling, distillation and ease of swirling; it is produced in a number of different glass thicknesses to stand different types of use. They are often made of borosilicate glass for heat and chemical resistance. Traditional Florence flasks typically do not have a ground glass joint on their rather longer necks, but typically have a slight lip or flange around the tip of the neck. The common volume for a Florence flask is 1 litre.<ref>Template:Cite book</ref>