The Aspire ET-S BVC Pyrex Glassomizer is made from Pyrex Glass, stronger and easier to clean. The Pyrex glass tube is reinforced with an aluminum shield with a visible clear slit and holds approximately 3.0ml of liquid capacity. The tank can be disassembled into four total parts for easy cleaning and maintenance. Coil heads can be easily replaced by unscrewing the bottom end cap. The Aspire ET-S is a bottom vertical coil design which provide twice the vapor and flavor. The ET-S takes advantage of a bottom feeding design so that the coils are always fed and saturated with just the right amount of e-juice. There are no exposed wicks, the liquid saturates the internal wick via two holes on the side of the coil.