My nips are hardwired to my cock, bought this hoping I'd be able to train my nips to be perkier and more symmetrical. These are poorly made, the glass bulbs broke the second time I used them. Doesn't provide enough suction and its awkward to get the rubber o-ring around your nipple. Would not recommend.
[ Editor's Note: If it failed on you in the first 30 days of ownership you can get a replacement under our 30 day warranty against defects. Just contact customer service. Make sure that when you're rolling the o-rings off of the glass cyliner onto your nipple. ]