These vibrating nipple suction cups provide a perfect double stimulation. The suction cups make your nipples swell up and also make them more sensitive. Your nipples are stimulated at the same time thanks to the mini bullet vibrators. The vibrators are attached to the cups in such a way that they always keep contact with your nipples. Use the grip pump to easily create a vacuum inside the cups. With the air pressure release valve, you can undo the vacuum in one movement.