Butterfly PreVent Pacifier Stage 1 Pink Designed by a pediatric dentist, Dr. Brown's PreVent Orthodontic Pacifier has a patented Suction-Free Air Channel that helps reduce suction and palatal pressure. The soft, suction-release bulb spreads wider as baby sucks for low pressure comfort. PreVent helps to lower the pressures that can create dental issues, such as crossbites. The thin-stem design is minimally intrusive on baby's mouth. There are three stages of pacifiers available. Stage One is for babies ages 0-6 months.