Penis pumps are more than just sex toys, theyre tools that can help boost sexual health by being a non-prescription erectile dysfunction treatment. Water Penis Pumps tend to work quicker and more efficiently than traditional penis pumps so you can spend less time pumping and more time enjoying the results. The Nasstoys rechargeable H20 pump is unique because not only can you use it in the bath or shower by filling it with water, then placing your penis inside and beginning the pumping sequence. It can also be used outside of water, as a traditional air pump.