Known as the world's best penis pump, Bathmate produces a series of products create suction when activated hydraulically. These hydropumps create negative pressure and work especially well with warm water, allowing more blood flow to the penis. The XTreme Series of hydropumps are the most popular because they provide maximum negative pressure and are user friendly, providing and much more pleasurable experience with quicker results. Make Bathmate part of your daily shower or bath and find the potential of your erection.