PermaFLOW PF-07001 Never Clog Drain for $19.99. Shipping is free on orders over $25. Here is a screenshot for your reference. If needed, use this Filler Tool to pad the order to qualify for free shipping. This interesting device has won several awards in 2008. A video clip is also available here. At the time of this writing, all 3 user reviews have given it 5/5 ratings.