This dildo is made of glass. The glass is transparent and has blue spirals inside for a unique look. Glass is a strong, hygienic material that is smooth to the touch. It can be used with any lubricant. The dildo has a flat base, making the dildo safe for anal penetration. The slightly curved shaft makes it possible to stimulate the prostate or the G-spot. Clean the dildo before and after use for safe and hygienic use.