Abstract: For vaporizing an active ingredient, and apparatus includes a combustion chamber, a ceramic cup, and a dart. The combustion chamber vaporizes the active ingredient and includes a chamber inner wall. The ceramic cup is disposed within the combustion chamber and includes a cup inner wall, a cup outer wall, and at least one groove. The cup outer wall abuts the chamber inner wall and the at least one groove provides airflow along the chamber inner wall to the combustion chamber. The dart includes one or more scrapers. The scrapers scrape the cup inner wall as the dart is rotated within the combustion chamber.