The ultimate solution to colic reduction; it filters out even the smallest bubbles from the feed and prevents a baby swallowing air;The only bottle designed to reduce the likelihood of air ingestion from outside the bottle, inside the bottle and inside the milk;Patented valve technology means the teat remains full at any angle so a baby can feed in a natural position and at their natural pace;The valve in the teat shuts between suckles, so a baby can relax and breathe without becoming swamped, avoids guzzling and overfeeding;The variable flow technology emulates breastfeeding which starts and ends with non-nutritive suckling, when little or no milk flows