The Hegen PCTO™ Basic Starter Kit PPSU is designed to mimic the mother's breast with a velvety soft, elliptical shaped teat that promotes natural latch-on for babies, minimizing nipple confusion. The anti-colic feature prevents aeration and excessive air intake, safeguarding your baby from tummy upsets. The revolutionary one-hand closure allows the bottle to be pressed on and twisted off conveniently with zero spillage. The ergonomically designed 'Sqround' bottle makes it easy for babies to hold and prevents the bottle from rolling away. The smooth interior surface, wide bottle opening, and minimal parts make cleaning exceptionally easy. The asymmetrical teat allows for upright feeding, reducing the risk of milk backflow and mid-ear complications. The high-performance PPSU material withstands extreme temperatures, making it easy to express, store, and feed within a single container.