Tenga Flip Hole Black Masturbatorby Tenga From its hygienic flip open design to its cutting edge molding technology for intricate interior details, the reusable Flip Hole Series remains one of Tenga's most popular items to this day. The flip open design means that the interior details can cross over one another to create tightly packed interior details for exhilarating sensations. The Flip Hole also features one hand control pads that allow you to press into the material during use.