The PermaFLOW Drain promises to never clog. A self-cleaning design that includes a wiper that removes debris that can lead to blockage. The makers of PermaFLOW say it will eliminate the need for pipe repairs, chemicals and plungers. The design of the PermaFLOW also makes it easier to retrieve jewelry and other items that are accidentally dropped down the drain. At only $20, this sounds like a genius alternative to traditional P-traps. You can see it in action in this YouTube video.