The Wotofo Easy Fill Drip Cap is for use with Chubby Gorilla e-juice bottles. It enables RDA users to easily drip from a 60ml E-liquid bottle. Simply screwing this top cap onto the preferred bottle of choice and pressing down pumps the perfect amount of juice into the build deck. It is constructed with a light, food grade polymer and features a rubber seal located above the connecting threads. This creates a flawless seal giving users peace of mind knowing thinner e-liquid will not leak from their bottles. The Easy Fill Drip Cap is perfect for drippers on the run and is hassle free.