The Hydrology9 has reinvented portable, liquid vapor filtration. Revolutionary in design and engineering, the Hydrology9 is a powerhouse that delivers high-precision performance. Every feature showcases the ingenuity of the design giving the user total control via temperature, airflow, and materials. The borosilicate glass mouthpiece sits on the lips and is topped off with a protective magnetic lid. Activate Party Mode and watch the LEDs light up and change color throughout the session. A rotational dial, located in the base, allows you to stir the materials in the chamber. With a simple twist, the built-in stir tool will refresh the chamber, meaning more efficient sessions.