10 oz (300 ml). Orthodontic. BPA free. Original orthodontic nipple reduces colic & promotes healthy teeth formation. Medium flow. Silicone. Reduces colic. Orthodontic nipple. Simulates & supports breastfeeding. Nuk Air System reduces colic. Promotes healthy teeth formation. Shaped more like mother's breast. Same Nuk nipple shape. All Nuk nipples and pacifiers have the same orthodontic shape. Supports switching from breast to bottle to pacifier. All Nuk Orthodontic bottle system products are dishwasher safe, top rack only. Instructions for use and care are enclosed. Original orthodontic nipple reduces colic & promotes healthy teeth formation. Feeding hole positioned so milk mixes with saliva for good digestion. Upper face is convex to stimulate correct palate development. Flat side reinforces correct tongue position. NUK Air System vent to reduce colic. Wider base, more like mothers breast. Special Design Reduces Colic: The NUK Air System vents the bottle, preventing vacuum build up; This allows baby to drink continuously, swallowing liquid instead of air; Available in slow, medium and fast flow. Orthodontic Nipple: Is the same orthodontic shape as NUK pacifiers, designed to fit baby's oral cavity; Promotes healthy teeth formation and strengthens baby's jaw. Simulates & Supports Breastfeeding: The nipple is shaped like mother's breast during feeding; Studies show it simulates the breastfeeding experience; Supports switching between breast and bottle. Hood, collars, disc and nipples made in Germany. Directions: Use the sealing disc to prevent leaks when transporting the bottle, or when shaking to mix formula. Use: Make sure the Nuk Air System symbol is under the baby's nose for the best results.