Innokin Zlide Tank
The Zlide is essentially a mouth-to-lung device with a convenient top-fill design and dual adjustable airflow. Despite being mouth-to-lung, the Zlide comes with both a 0.48Ω Plex3D sub-Ohm coil and a 1.6Ω mouth-to-lung coil. There's a really good selection of different coils available because the Zlide is compatible with all the Zenith coils.
This item is intended for experienced users because of the sub-Ohm coils and higher power required to fire some of them. Sub-Ohm coils also need to work with higher VG juices