The Philips Avent Deco Boy Safari Natural 9-oz Baby Bottles combine the most natural way to bottle feed with a playful, trendy blue and green design. The wide, breast-shaped nipples on the Natural bottle promote natural latch-on so you can easily combine breastfeeding and bottle feeding. The unique comfort petals inside the nipple increase softness and flexibility without nipple collapse, and the innovative twin valve anti-colic newborn-flow nipple helps newborns feed comfortably and easily. The ergonomic shape makes it comfortable for parents to hold and easy for small fingers to grasp. Assembly is simple with only a few parts, and the wide bottle neck makes filling and cleaning easy. These Natural bottles are made from polypropylene, a BPA-free material, and work with all nipples and caps from the Natural line.