The Dr. Brown's Anti-Colic Options+ Glass Bottle Set offers 18 glass bottles for infant feeding, featuring clinically proven technology to reduce colic in infants. The internal venting system allows for vacuum-free feeding, which decreases spitting up, burping, and gas, while preserving the nutrients in the milk and supporting digestion. Made from heat-resistant and thermal shock-resistant glass, these bottles withstand gradual temperature changes and are suitable for the dishwasher (top rack only), electric sterilizers, microwave sterilizers, or boiling in water. The silicone nipples ensure a consistent flow for comfortable feeding at the baby's individual pace, with a breast-like shape that promotes proper latching and supports the transition between breastfeeding and bottle feeding. This BPA-free set is designed to grow with the baby through all feeding stages and is recyclable. The green-colored bottles feature a durable construction for reliable performance and are suitable for all infants regardless of gender. The bottles have a robust design that easily withstands regular sterilization and daily use, and they are compatible with all common sterilization methods. The ergonomic shape allows for easy handling during feeding, while the thoughtful design simplifies cleaning. The set is ideal for use at home and on the go, with the glass quality ensuring a long lifespan with proper care. The bottles meet European safety standards for baby products and are designed to provide a hygienic and safe feeding experience.