Silicone Nipple Suckers. For those looking for a lighter way to play, these Silicone Nipple Suckers are a perfect addition to your bondage and BDSM toolbox. Made from 100% medical grade silicone, simply squeeze the bulb and apply it to erect nipples. Gentle suction creates an exhilarating pressure without causing pain. For a delightfully erotic experience, attach a chain or weights to the rings.