· 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