The Pigeon Cooling Teether Triangle is designed to soothe teething discomfort for babies. BPA-free and ideal for stimulating development of baby's hand and finger coordination. Key FeaturesBPA Free Key Materials: Outer material: Soft, chewable plastic or Silicone; Inner material: Purified water.Pigeon: Experts in baby care essentials and innovative teething solutions.Before Use: Clean and sterilize. Place in the refrigerator (not freezer) to cool. Hand to baby to soothe gums.Not Suitable For Children Under 4 Months.