#1 Bottle Brand The Most Natural Way to Bottle Feed Wide Breast-Shaped Nipple Easy to Combine with Breastfeeding Soft Nipple Mimics the Feel of the Breast Airflex Vent Designed to Reduce Feeding Issues Such as Colic BPA Free Natural Latch On: The wide breast-shaped nipple makes it easy for your baby to combine breast and bottle feeding. Soft Nipple: Designed to mimic the feel of the breast. Flexible Spiral Design: Combined with our unique comfort petals on create a flexible nipple, allowing for a more natural feed without nipple collapse. Unique anti-colic Airflex vent technology: Designed to reduce colic and discomfort by venting air away from your baby's tummy. Choosing the right nipple Different flow rates to keep up with your baby's growth. Use the Phillips Avent Natural bottles only with Phillips Avent Natural feeding nipples.