Electronic cigarette, as an alternatives of traditional cigarettes, is becoming more and more popular among smokers. Generally speaking, there are two main categories for E-cigs, the open pod system and the closed pod sytem. The biggest difference between them is that the open pod system always come with refillable design and the closed pod system is often with disposable features. Indeed, disposable vapes currently are the main trend of the vaping industry, and IVAPIN is making great effort to be the main trend of disposable vape brand.