Olababy Gentle Bottle Single 4OZ Rose, designed innovatively and sensibly to mimic natural breastfeeding. Featuring a smooth texture and a breast-like shape, this bottle perfectly fits the baby's mouth and allows young ones to seamless switch from breast to bottle. It is integrated with an advanced dual-venting anti-colic system that helps baby swallow milk with minimum air ingestion. Therefore you and your little one can enjoy feeding with less colic, burping, and spit-ups. The bottle's nipple and body is made with a soft, skin-like silicone material to offer a comfortable, soothing, calming feel and better grip. This Olababy gentle bottle is odor-free, stain resistant and easy to use, clean, and assemble. It also comes in bright, attractive colors to help encourage the baby's visual development. • Nipple and body are 100% Non-toxic silicone • BPA, PVC, Phthalate free • Safe for microwave, dishwashers, and sterilizers.