100% silicone one-piece construction;NUK Orthodontic shape nipple soothes and calms baby better than our original nipple and its asymmetrical shape helps promote healthy oral development by naturally fitting into your baby's palate;Scoop nipple cavity allows maximum tongue movement, which gently exercises your baby's tongue, palate and jaw and promotes proper teeth alignment by helping your baby avoid thumb-sucking;Heart shaped shield fits perfectly under baby's nose for easy breathing and less irritation;BPA free and made in the USA;Comforts and soothes baby^Concave shield stays off babye^3 vent holes for better air circulation to help prevent skin irritation