Filter Flask With Socket 2000 ml This filter flask is perfect for any lab worker or scientist who needs to filter liquids. It holds 2000 ml of liquid, which is plenty for most filtering purposes. The filter itself is made of high-quality glass, so it won't break easily. And the included funnel makes it easy to pour liquids into the flask. Whether you're filtering solids out of liquids or liquids out of gases, this filter flask is up to the task. So don't wait any longer.