Better erections and stamina Designed to improve erectile function as comfortably as possible, the BathMate HydroXtreme 7 is one of the best water-based penis pumps that BathMate has ever created. In case you don't know, BathMate is a company creating penis pumps that use a hand pump and water to apply pressure to the penis, giving you a "vacuum erection" that may help improve blood flow and produce temporary increases in penis size. It feels a little weird at first, but you get used to it. Most commonly used as part of someone's shower routine, the BathMate HydroXtreme 7 comes with a