The all new Aspire Nautilus Bottom Vertical Coil technology features a no-wick design and offers a much longer life-cycle and better vapor production. Simply unscrew the bottom of your Nautilus Tank, then unscrew the replaceable coil head, screw the new one in and you are ready to vape in style. These heads produce tons of vapor, do not leak or gurgle, and combined with the amazing adjustable airflow control valve of the Nautilus Tank produce amazing flavor.