Orthodontic symmetrical collapsible nipple so right side up or upside down, Philips advent pacifiers help ensure natural development of teeth and gum, Taste and odor-free silicone nipple makes for an easy transition between pacifier, breast and bottle, Includes two pacifiers, ideal age range: 6-18 months, Warning: Do not tie pacifier around child's neck as it presents a strangulation danger, Colors and designs may vary