Tenga is not content to rest on its laurels even after creating some of the best-designed sex toys in Japan. No, the Apple of the adult industry continues to innovate and demonstrate that there is still more that can be done with masturbation aids. The Tenga Bobble Crazy Cubes is the latest example of the brand's uncompromising verve and vision: a masturbation sleeve featuring two types of gel (soft and elastic/pliant) and five integrated cubes that result in incredible stimulation. The see-through toy is very squeezable and stretchy, so you manipulate it into just the right angle and degree of tightness that you want, and ensure you can really get the most out of the cubes rubbing up against your penis. When you are done, you can easily turn the stroker inside out for better cleaning.