Orthodontic, collapsible and symmetrical nipples respect the natural development of baby’s palate, teeth and gums - even if the pacifier ends up upside down in the mouth. All Philips AVENT Pacifiers are made of silicone. Silicone pacifiers are taste-free and odor-free and tend to last longer than latex pacifiers. For ultimate hygiene, all our dummies come with a snap-on protective cap, and because they are vented, they can be steam sterilized. They also feature a safety ring handle and air holes in the shield to help prevent irritation of sensitive baby skin.