A simple remedy for flat or inverted nipples - Using gentle suction, the nipple is extracted into a small plastic cup. Within weeks of continued wear, the nipple will remain permanently erect. Non-surgical - uses gentle suction to stretch the milk duct - painless, without surgery. Basically your nipples are not sore, practice more, noticeable improvement after a few days. Be patient. Easy to use - Hold the aspirator to the nipple with one hand and apply suction by pulling the syringe with the other (a small smear of a petroleum-free lubricant at the vacuum base can improve suction). A complete set - corrector nipple provide greater suction, you can use it at home, and vacuum nipple can easily conceal under the support - throat, you can use it at night or work. accessible and safe to lose for your daily use, also can be easily carried while traveling.