E-Liquid vape pens are by far the most popular type and the type most people refer too when they talk about vape pens. With the starter kits, you get everything you need to start vaping except the actual e-liquid as the flavors and strengths are so vast it would be counterproductive for the manufacturers to include it.
A typical kit comprises of a base unit which often houses the battery, on the shaft you have the power and fire buttons. You also get a tank with a pre-installed coil and a USB charging cable.
The kits vary from brand to brand but the majority also give spare atomizer coils, glass housing and a selection of replacement o-rings.
EVOD style vape pens are another popular type of vape pen, used to vape e-liquid and often referred to as EGO E-Cigs.
They are basic vape pens and ideal for the new vaper or those who are trying to quit smoking with e-cigs. They are all available in starter kit form and the only thing you have to buy in addition is the e-liquid, as with all vape pens and e-cigs.
EVOD generally have an atomizer which has a resistance greater than 1-ohm, and therefore require less power and also ideal for mouth to lung inhales as the draw is slightly more resistant and requires a harder pull, similar to regular cigarettes.
CBD Vape pens are no different than regular vape pens, they can be used for both e-liquid and CBD liquids.
There are companies that specialize in just CBD Vape Pens, but in our opinion, they are not as good as the mainstream brands.
Don't be fooled into buying a separate pen for CBD. Just change the coil as you would when changing e-liquid and try it out. Or buy one of the best vape pens that can be used for both e-liquid and CBD as listed here.