Vape is known by several other names, such as vape juice, e-juice, and e-liquids. These items all describe liquids that users put in their vape pen for producing the vapor. The liquid is easy to use; place a few drops in a vape pen and let it heat up between 200 and 400 degrees. This creates the vapor to inhale. CBD vape juice is simply the liquid with infused CBD extracts. Beyond the base ingredients, vape juices come in various formulas.