Please keep in mind that this is an all-in-one disposable vape pen. This means that the CBD oil in this cartridge cannot be removed and applied to other vape batteries.
With that said, you do not need to purchase anything else to use the Wildflower CBD+ Aches vape pen. You will be able to open it up and start using it right away. Once you have finished the CBD in the vape pen, you can dispose or recycle the pen as you normally would.
I hope this information helps! :-)