Description Simply Closest to Mom's BreastAdvanced Anti-Colic Air SystemMultiple Nipple Holes Just Like MomSiliconeBPA FreeNow your baby can transition from breast to bottle in a natural way. Designed to mimic the fit, flow, and movement of mom as closely as possible, This is the only bottle with up to nine nipple holes, just like mom. This provides a natural feeding experience to ensure the mom-baby bond remains strong. Our bottles feature an even softer nipple than before. They mimic the shape mom's breast takes while breastfeeding. The scooped nipple cavity allows space for baby's tongue and jaw to move naturally, just like they do when breastfeeding. Suggested use Care: Prior to first use, sanitize by boiling in water for 5 minutes. For day to day cleaning, wash with hot water and mild detergent then rinse clean. Dishwasher-safe (top rack). For hygiene and safety, replace nipples after about 2 months of use.Use: The vent on the nipple should be under baby's nose, feeding hole will be facing upwards. Compatible only with NUK® Simply Natural™ Bottles. Warnings To prevent possible choking hazard, test strength before each use by pulling the nipple in all directions. Any tear can lead to the separation of pieces. Discontinue use if any tear or crack appears. Do not attempt to enlarge the hole as this may lead to tearing. Prolonged periods of time drinking liquids, other than water, may cause tooth decay. Disclaimer While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb. Visit manufacturer's website