Itsvaping proudly stock MET4 Ejuice. MET4 Vapor Eliquid is an Ultra Premium American Ejuice company that specializes in the creation of gourmet vape juice. MET4 Ejuice prides itself in providing high quality eliquid vape juice through research, development, rigorous testing and innovation. MET4 Eliquids are dedicated to providing some of the best vapor liquids and vapor products on the market.