The conical shape makes it ideal for mixing liquids. The screw thread allows a tight sealing of the flask.– Easy mixing due to conical form – Easy-to-read scale with graduation marks to estimate the content – Fired-on, highly durable white ceramic – The flask can be closed with a PBT cap or membrane cap (permits gas exchange) – The conical shape makes it ideal for mixing liquids. The screw thread allows a tight sealing of the flask.– Easy mixing due to conical form – Easy-to-read scale with graduation marks to estimate the content – Fired-on, highly durable white ceramic – The flask can be closed with a PBT cap or membrane cap (permits gas exchange) –