This newly designed Cloutank M3 is equipped with a unique feature that “Auto Cleans”. Allowing for the user to press down on the mouth piece to remove any remnants post vaping. Additionally while vaping, the M3 it can be used to re-arrange and mix the dry herbs without removing the tank. Its convenience, efficiency, and discreet, original style is what makes this Cloutank M3 so popular. It is recommended to use the F1 battery with this tank, but it can also be powered by any 3.7v EGO/510 thread battery.