Bottle is uniquely designed to reduce colic Advanced bottom venting system helps reduce air ingestion Angled design supports semi-upright feeding position, recommended by pediatricians to help prevent ear infections Fewer parts to clean at home BPA-free Playtex VentAire bottle is uniquely designed to reduce colic. Its advanced bottom venting system helps reduce air ingestion. The angled bottle design supports a semi-upright feeding position, recommended by pediatricians to help prevent ear infections. The VentAire bottle is compatible with all Playtex nipples to match baby's unique preferences.