Bought this on a whim and I’m glad to say there are absolutely no regrets! The product is well made, the suction is really strong and the cylinders hold really well. The best part of course is that the cylinders are transparent, so you can see what is happening inside, which is a great turn on (^; being able to detach them without losing the suction also adds a degree of delight, as the nipples are now free to be tugged on. Leaving my nipples in there for a while left them extremely perky for a long time even after removing the cylinders, making them ready to be embellished with various other clamps and rings. Do get these if you’re into nipple play!