A pacifier, also known as a soother or teether, is a small device made of rubber, plastic, or silicone designed for infants to suck on. It typically has a nipple-shaped part that mimics the shape of a mother's breast, providing comfort to babies. Pacifiers can help soothe fussy infants and may assist in promoting self-soothing behaviors. Parents often use pacifiers to help babies fall asleep or calm down during stressful situations. While pacifiers can be beneficial, it's important to monitor their use, as prolonged reliance may affect dental development and breastfeeding practices. Regular cleaning and replacement are also essential for hygiene.