The unique funnel shape of the GoGirl™ was designed to contour to the female anatomy and create a natural seal when positioned correctly. The GoGirl™ has a lip which prevents overflow and leaks. The tip of the GoGirl™ allows for liquid to “spiral” which creates a steady stream so you don't have to worry about spraying or splashing. The GoGirl™ is hypoallergenic, soft, flexible, durable, repels liquid and is odor resistant. GoGirl™ is easy to keep clean. You'll be surprised to find out that with the help of gravity and the texture of medical grade silicone, almost nothing is left behind.