Classic Slim Neck Nipple – Vari flow – 2pk - 3208ITEM NO: 3208 Features Designed to resemble breast feeding and help form babys palate by improving suction. Variable flow teats can provide all three rates. Have to simply turn the slit of teat to different angles to babys mouth. Made from high quality medical grade silicone. Volatile and nitrosamine safe. Odorless, tasteless, and guaranteed not to perish. Age limit 3m+ Consists of 2 pcs pk.