The Pigeon Flexible Nipple is designed for babies 9 months and older, offering a soft and elastic feel that minimizes colic. BPA-BPS free, it fits slim round hole bottles perfectly. Soft & Elastic Minimizes Colic Slim Design Round Hole BPA Free Key Materials: Flexible Silicone (designed for 9+ months flow rate); Anti colic vent.Pigeon is renowned for its innovative baby care products, specializing in feeding solutions and accessories.Before Use: Sterilize teats by boiling for 5 minutes or using a sterilizer. Insert teat into the bottle ring. Replace teats every 3 months.Inspect nipple before each use. Discard immediately if torn or damaged (choking hazard). Replace after 3 months of use.