These nipple suckers do just as their name implies. You attach them to your nipples and they suck. Aside from this standard use, they can probably be used to apply suction to other areas, but use caution as they may leave a mark or cause discomfort. As for wearing under clothes, they are readily apparent despite being "mini" and still manage to pop off if clothing rubs them the wrong way.

To use these little guys, I tend to gently squeeze the bulb, place the "mouth" over my entire nipple, ensure that the entire mouth is in contact with my skin and let go. It is best to start with a small squeeze of the bulb, as too much will cause excessive suction, pain and injury. Go slowly.

Since these are small, they should be fine for beginners to nipple play, and are less threatening than metal clamps and the like. The suction is adjustable depending on how much you compress the bulb. Don't overdo it.

This product is made of PVC. As someone who believes all sex toys should be made of the safest materials, this doesn't make me terribly happy. However, as they are not used for penetration or on mucous membranes, and aren't typically exposed to infections bodily fluids/wastes, I have some lenience for them. Be warned, though, they likely still contain phthalates that will leach out of the material.

I did notice a bit of a smell, but nothing overpowering. It lessened as the toys were left out in the open to air out.

Moving away from that; the material is shiny and smooth, firm but can be squished with the fingers, and resilient enough to return to its original shape. This external texture is nice. However, I found that the mouth of the suckers was uncomfortable during use. Being as firm as it was, it easily left a ring around my nipple. Ouch.

I look at these and think of little boxing gloves for some reason. That aside, they do perform as described and it isn't too difficult to grasp them. They aren't too difficult to put on, and removal requires only that you squeeze the bulb to reduce suction and then lift off. I found them very stimulating but they did become uncomfortable over time. Again, wearing under clothes is difficult both in terms of discretion and maintainability. They pop off fairly easily if your clothes are not very light. They do stay on if nothing is touching them, however.

In terms of the sizing; they fit over my nipples and areolas completely, but do note that I am male and have small nipples. If you just want something to apply suction to the nipple alone, these should be fine for most average-sized ones. However, if you have particularly large areolas and want something to apply suction to those, a larger size may be necessary. The suction bit is less than an inch in diameter.

Again, suction is adjustable by squeezing the bulb. These can really suck, and it can really hurt. Be cautious.

These are fairly easy to clean. Mild soap and water are recommended, and it is a good idea to wash them well before the first use. Make sure that you clean the inside, as sometimes they exert enough suction to draw fluid from the skin. As they are not being inserted, you have fewer "dirty" substances to worry about, but cleaning is still important.

Storage is pretty simple. A small cloth bag is ideal, but most forms of isolated storage are appropriate. Keep them away from heat sources, direct light and other sex toys, as these probably contain phthalates which could damage some materials. While I had them, I just kept them on a shelf in my closet and they were fine.

The packaging isn't terribly classy, but what can you do?

They are in standard clear plastic molded packaging, the nipple suckers suspended in the mold and a cardboard background with suggestive imagery and some words discussing the function of the product. The container contains no real instructions.

You could keep the packaging when giving as a gift, but it borders on gag gift packaging to a degree. The packaging could be considered indiscreet when seen in a store.

I used these a few times before feeling like they were doing more harm than good. The stimulation was definitely there, but it quickly turned to pain that I didn't want. My nipples were more sensitive after using these, but not always in a good way.

I think these could be useful for people who like things to be a bit rough, or maybe my nipples are just too sensitive for these. In any case, I recommend using very little suction at first and moving slowly.