A Büchner flask, also known as a vacuum flask, filter flask, suction flask, side-arm flask or Kitasato flask, is a thick-walled Erlenmeyer flask with a short glass tube and hose barb protruding about an inch from its neck.
The Erlenmeyer flask was created by Emil Erlenmeyer in the 1860s to help scientists have a better way of mixing, pouring and storing chemicals. The flask has a flat bottom that makes it easy to place on a table or a flat surface.
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. A common volume for a Florence flask is 1 litre.
A volumetric flask is a piece of laboratory glassware that is used to prepare a chemical solution. It measures volumes much more precisely than beakers or Erlenmeyer flasks A volumetric flask is a piece of laboratory glassware that is used to prepare a chemical solution.