If you are new to vaping, you may not know that you can refill your cartomizers. Pre-filled carts are great for when you’re just starting out, or even if you’ve used e-cigarettes for a few years. They are incredibly easy to use. Just take off the clear rubber caps and screw one on a battery. It’s that simple! For people who are interested in learning all they can about e-cigs, carts, and e-liquid, or want to take their vaping to the next level, there are blank cartomizers. Blank cartomizers come in a few varieties to suit your particular preference. To use a blank cartomizer, you must remove the rubber caps and then fill it with 20-25 drops of e-liquid. There are many methods on how to fill a cartomizer, which you can read about here. Pre-filled cartomizers can also be refilled when they are empty.