- Built-in valve flexes with baby's natural feeding rhythm and lets baby control the flow of milk, which can help reduce the risk of overeating and spit-up
- Valve also prevents a vacuum from forming in the bottle to keep air out of baby's tummy
- Reduces colic and gas after feeding
- Do not use Variable Flow nipples as an alternative to the Slow, Medium and Fast Flow nipples, as marking I is faster than the Fast Flow nipple. These nipples are not intended for babies who are already drinking independently
0 Months + - Newborn Flow Rate is most like breastfeeding flow making these nipples ideal for newborns or breastfed babies of all ages
1 Month + - Slow Flow Rate is ideal for babies who are one month or older or breastfed babies of all ages
6 Months + - Fast Flow Rate is ideal for babies 6 months and up