The ZERØ bottle with anti-colic bag works in the same way as the mammary glands. Its system makes the bubbles disappear to prevent air intake, helping to reduce the baby's gaseous colic. Its ultra-soft silicone teat simulates the shape, length and feel of the mother's nipple. Available for two capacities: 180 and 270 ml. 3 flows available: Slow flow: Allows a small amount of liquid to pass through. Indicated for the first days of life, for milk, glucose or water intakes. Medium flow: Allows all kinds of liquids of medium density to pass. Ideal for milk, juices and very liquid porridge. Adaptable flow: Lets more or less liquid pass through depending on the strength with which the baby sucks. Specially designed to combine breast with bottle.