Vape pens are an umbrella term encapsulating several devices with different functions. There are vape pens for cannabis wax, cannabis oils, cannabis herbs, and e-juice nicotine. Vape pens are sometimes also referred to as e-cigarettes, which is another term that refers to all nicotine vape devices.
Most vape pens are composed of the following parts: a battery, a mouthpiece, a tank or cartridge, and an atomizer. In some devices, the atomizers can be swapped out so you can vape different types of THC and CBD concentrates like waxes, oils, and herbs.