The V-Tank is just 157mm long (82mm excluding battery, 130mm long with a short e-cigarette battery) and16mm in diameter.
Just fill the inner Pyrex tube with tobacco or your smoking blend of choice, re-assemble the unit, hold the battery button for about five seconds, and then slowly inhale.
The clear side means you can observe the vaporizing action and thus ensure you do not overheat your smoking blend.
IMPORTANT: The V-Tank is supplied without battery.
the majority of e-cigarette batteries are compatible with the V-Tank or you can purchase a complete kit which is supplied complete with battery and USB charger, the choice is yours