Less reflux means less fussing and more enjoyable feedings for parents and babies. Dr. Talbot’s Silicone Anti-Colic Bottles are designed with a venting system to help reduce colic symptoms and a self-sterilization system that uses only the bottle components, water, and a microwave. To meet your family's needs, Dr. Talbot’s offers an array of replacement parts for our Silicone Anti-Colic Bottles. This replacement venting system fits Dr. Talbot’s 5 oz or 8 oz . Available in a convenient 2-pack, parents will always have back up at home or on the go!