Graduated Fleaker 800ml, Corning (Pyrex No. 5900), Refurbished

A Fleaker is a brand of container for liquids used in the laboratory. It can be described as a cross between the Griffin beaker and the Erlenmeyer flask. Like a beaker, the bottom is flat, with the sides meeting the bottom at a 90 degree angle. The sides are vertical for most of the height; near the top, the sides curve in to form a neck with a widely flared rim