Soft flexible wideshaped nipple promotes natural latchon so its easier for baby to combine with breastfeeding Advanced anticolic system with innovative twinvalve Made of soft durable silicone which is odorless and flavorless Dishwasher safe Compatible with all Philips Avent Natural bottles Fast flow for infants at least 6 months of age BPAFree and made of soft durable flavorless silicone Wide breastshaped nipple promotes natural latchon and makes it easier for baby to combine breastfeeding and bottle feeding Comfort petals make nipple softer and more flexible to prevent nipple collapse Innovative twin valve design reduces colic and discomfort Includes 2 Natural Fast Flow Nipples