The Munchkin Flow nipple shield is an innovative technology that allows mothers to witness the flow of breast milk for the first time in history. A patented built-in channel provides visual confirmation of milk flow, thereby enhancing breastfeeding confidence and assuring mothers that their babies are getting the nutrients they need, which continues one of the most plastic moments of intimacy in life. This revolutionary function addresses one of the most common concerns of nursing mothers: the perception of insufficient supply. Flow products meet the highest level of maternal and child safety standards and are made of 100 percent BPA-free, food-grade silicone.