Durable and Heat Resistant: The bottle base is constructed from polyphenylsulfone (PPSU), a medical-grade plastic known for its durability and heat resistance. It won't retain odors or stains from breast milk or formula, making it ideal for regular use and frequent sterilization. Super Soft Silicone Teat: The bottle teat is made from super soft, resilient silicone with a matte texture that feels closer to the skin, providing complete comfort during feeding. Breast-Like Teat: Developed with input from breastfeeding experts, the teat's shape mimics the natural flex, stretch, and movement of a mother's breast, making it easier for babies to latch on and transition between breast and bottle. Anti-Colic Design: The bottle features an Easi-Vent valve that reduces excessive air flow, helping to prevent symptoms of colic by ensuring that babies ingest more milk and less air. Wide Bottle Neck: The wide bottle neck facilitates easy cleaning and encourages babies' intuitive feeding actions. The compact bottle shape allows babies to be closer to their caregivers during feeding. Flow Rate Options: The bottle comes with a medium flow teat suitable for babies aged 3+ months. Tommee Tippee offers different flow rates to accommodate babies' changing needs as they grow. Easy Cleaning and Sterilizing: The wide neck design makes it easy to clean the bottle, and it is suitable for use in the dishwasher, microwave, and steam sterilizers. The bottle can be easily disassembled into three parts for thorough cleaning and sterilization. Teat Replacement: It's recommended to replace the bottle teats every two months, or immediately if they become damaged, weak, or bitten by tiny teeth. Overall, the Tommee Tippee Closer to Nature PPSU Baby Bottle offers a combination of durability, comfort, and convenience, making it an excellent choice for parents seeking a reliable feeding solution for their little ones.