This pair of suckers is made of a thick, flexible black plastic. It can take a couple tries to position them and "loosen them up" before they provide a good suction. They tend to fall off if not enough suction is generated on the first attempt, so expect to take a minute or two to get them on right. Prior to playing with them it's a good idea to squeeze them hard between your fingers and roll them around a little to get the plastic more flexible. This takes a minute or two but it's worth the effort; you'll have a much easier time squeezing them to get them placed properly if the plastic is warmed up and more flexible.

One of the best tips I can give is to place the open end over the nipple, then squeeze the air out, then work it back to its natural shape to gain suction. I haven't found lube to be necessary with these.

The best thing about the suckers is they can be easily removed and replaced if the suction gets to be too much. If you've got good suction you may hear a little popping sound as they're removed, but what good is a little sex play without something funny? The biggest downside is that if they're not properly placed or there isn't enough suction, they're prone to falling off.

I've used them for clitoral play a few times as well. It's a little tougher to position the sucker but the effort pays off!

You should note that prolonged wear will cause your nipples to swell for a few hours, so this is definitely not something to use right before going out in public if you're not willing to have people notice your swollen hard nipples. Trust me, they will.

I like to warm them up a little before I put them on. I usually wash my hands first with really hot water, then roll them between my palms and give them a few good squeezes. The squeezing and heat will make the suckers more pliable and less prone to falling off.

These aren't a toy I use for every session but once in a while I add them to my play to enhance what's already going on. During most uses I leave them on for over half an hour and increase the suction a few times per session; I like to remove them to play with my nipples manually for a bit, then put them back on with more suction. They increase sensitivity like you would not believe!