Flat or inverted nipples, overactive letdown, sore nipples ? the one-of-a-kind Dr. Brown?s? Nipple Shields with Sterilizing Case can help breastfeeding moms with many kinds of latch-on issues. The ultra-thin, soft 100% silicone shield feels more natural, featuring a cut-out to maximize skin-to-skin contact with baby. Additional holes provide a more anatomically correct experience to help prevent pooling milk. The all-in-one carrying and Sterilizing Case protects the shields, microwave sterilizes, and acts as a drying rack. It?s even clinically shown to eliminate 99.9% of bacteria, mold, and the yeast that causes thrush. The smart side-by-side design offers more even drying, avoiding stacking the shields and collecting water. Size 1 Stretch Fit stretches up to 24 mm. Nipple shields are temporary tools to use under the supervision of healthcare professionals. Comes with two (2) Nipple Shields and one (1) Sterilizing Case. BPA free.