1. Freely Adjust the Rotating Handle The handle is free to choose from multiple angles, and the left hand and the right hand are easily pressed. 2. Special anti-overflow Design Prevent the precious breast milk spills 3. 360 Massage Buffer Shield with Air Cushion Special 360 massage shield pad with air cushion, continuous massage during breast pumping to protect the nipple from frictional discomfort. 4. Smart Size Portable without burden. 5. Natural Suction Force Design Resembles a baby's nursing rhythm design 6. PPSU Premium Food Grade Material PPSU Bottle is light and safe, keep precious breast milk pure without BPA