Dr Brown'S Natural Flow The Dr Brown'S Soothers Help Minimize The Pressures Inside Baby'S Mouth. These Pressures Can Sometimes Create Dental Issues Such As Cross Bites. Palatal Pressure Is Lessened By Creating An Air Channel That Reduces Suction And Spreads Apart When Baby Is Sucking. This Patented Suction Free Air Channel Opens Up As Baby Sucks For Low Pressure Comfort. Helps Minimize The Pressures Inside Baby'S Mouth Helps Minimize The Pressures Inside Baby'S Mouth. This Patented Suction-Free Air Channel Opens Up As Baby Sucks For Low Pressure Comfort. Bpa Free Age : 6 To 18 Months.