The NUK Disney Smooth Flow Bottle & Pacifier First year set combines the soothing and calming qualities of NUK Smooth Flow bottles and orthodontic nipples along with the Disney designs your baby loves. All nipples on the two bottles, the cup, two replacement nipples, and two orthodontic pacifiers are designed to soothe and calm baby while promoting healthy oral development. This Smooth Flow bottle nipple adjusts the flow based on how your baby drinks, adapting to their suction strength to ensure they will always have the right flow rate. The SafeTemp temperature indicator lets you know when milk is too hot with just a glance. The blue thermometer indicator fades when milk is too hot and reappears when milk has cooled and is safe to drink. All items in this first year set are top-rack dishwasher safe and BPA free.