Let your Nipples Rise to the Occasion with the NIPPLE BULB, a gentle little suction device for enhancing and raising your nipples! Just apply to the nipple and squeeze for light, comfortable suction! To use the erection O rings, slip ring on the vacuum tube before suction begins. Then, slide off tube onto erect nipple! The NIPPLE BULB comes complete with 4 Nipple Erection Rings!!!