Treat Yourself to The Sensuous Feeling Of Glass. There's a reason that people love glass sex toys. Nothing else feels so frictionless, smooth and satisfying, so great against your skin. The Sinclair Institute Select Onyx Glass Wand combines glass with a unique design that's perfect for G-spot and prostate stimulation. The wand is made of 100% borosilicate glass with a delicate etched leaf design. It features an angled, ridged G-spot and prostate tip. The wand is compatible with all lubricants. The glass material makes the wand ultra-hygienic and easy to clean.