They use pods. There are plenty of methods to refill a vape pen or an e-cigarette. When copyright initially came onto the marketplace, they made the “pod system” mainstream. View Introducing the Geek Bar Pulse Disposable, a compact however substantial-overall performance disposable vape gadget capable of offering around 9000 puffs, https://vaporizeraussie.com/product/uwell-caliburn-a3-pod-kit/