Bebeta Baby products satisfy the National Standard Satisfaction of Health and Safety Inspection of Food and Drug Administration or FDA. This silicone nipple are made with high quality food grade silicone. Durable and high tension. It has a special air vent design which helps better air circulation for smooth sucking and no leakage. Before each use, it should be sterilized for 2-3 minutes. Be sure to examine it regularly for cracking or other signs of wear and tear.