BPA free. No. 1 selling pacifier brand. Promotes healthy oral development. Nuk Air System. Nuk natural shape nipple promotes healthy oral development. Nuk pacifiers are based on the shape of a mother's nipple while breastfeeding and are therefore optimally adapted to the baby's oral cavity. The orthodontic design gently exercises the tongue, palate and jaw and encourages the correct development or your child's teeth. www.NUK-USA.com. Assembled in USA. Nipple made in Germany.