They use pods. There are numerous ways to refill a vape pen or an e-cigarette. When copyright initial came onto the marketplace, they manufactured the “pod technique” mainstream. Check out Introducing the Geek Bar Pulse Disposable, a compact still superior-efficiency disposable vape gadget effective at providing as many as 9000 https://vaporizeraussie.com/product/apple-pies-trippy-treats-60ml/