This can help keep the THC inside the tank clean. This is why some vapes have dual coils. Lastly, a good tank will usually have a glass cover on the outside of the tank. The heating coil's quality may have an impact on how quickly THC evaporates. A larger tank can hold more THC, which means more THC per charge. THC vaping is the ideal option if discretion is important to you. THC vaping also...