Merci Swell Vibrating Nipple Sucker CupsWake up nips! Get the most out of your nip stim game with the Merci Swell Nipple Sucker Cups. These auto suction nipple pumps are individually controlled and provide both stimulating suction and vibration that you can see working on your most sensitive parts. 7 powerful functions allow you to customize your experience and a quick release air valve ensures things only get as tight as you like.