Suavinex Zero Zero baby bottle Anti-colic with bag Medium flow rate M Textured silicone teat, flat, inclined and colored, one size fits all 270ml The result of simple observation of nature, the patented anti-colic sac contracts when the baby sucks, just like mammary glands do. The bag does not need external air to compensate for the internal vacuum, so there are no bubbles. This helps prevent gaseous colic in the newborn by preventing air from oxidizing the milk and destroying nutrients. Made of semi-rigid, flexible and highly resistant silicone, the baby carrier is easy to wash without the need for special accessories. Also suitable for premature babies with weak sucking strength.