Now baby can transition from breast to bottle in a natural way with the NUK Simply Natural Bottles. Designed to mimic the fit, flow, and movement of mom, 9 nipple holes imitate the shape of mom's breast while breastfeeding. Multiple nipple holes provide a natural feed, just like mom's breast. Features NUK's SafeTemp indicator, which changes color when milk is too hot. Nipple comes with 3, 6, or 9 holes, depending on flow rate. 5-oz. bottle comes with slow flow nipple that has 3 holes, 9-oz. comes with medium flow nipple that has 6 holes. Advanced 1-piece Anti-Colic Air Vent helps reduce colic, gas, and spit-up. Same shape as mom's nursing nipple during breastfeeding. Flexible nipple moves with baby for a continuous latch. Odor- & stain-resistant crystal-clear Tritan bottle is BPA-free and is easy to use, assemble, & clean. Available in boy, girl, and gender-neutral fashions. Available in 5-oz. and 9-oz. sizes and as a 1-pack, 2-pack, 3-pack, or gift sets. Imported.