Most pacifiers are made of three components: a silicone or latex teat for baby to suck on, a plastic shield that spans baby’s mouth, and a plastic knob or ring to attach the pacifier to a clip. However, there are also pacifiers that are made entirely from one piece of material. In this case, not only is the teat made of silicone or latex, but the shield and the knob or ring as well. These are called one-piece pacifiers.