Description Avent Natural Response Baby Bottle with Patterns 260ml 1 Month and + - Model: Giraffe is a bottle with a flow 3 teat, designed to reduce colic and discomfort. The Natural Response teat adapts to the baby?s natural feeding rhythm, which facilitates the alternation between the breast and the bottle. The teat has a unique opening that lets milk flow only when baby is actively drinking. Thus, it can stop to swallow and breathe, the flow also stops. This pacifier is wide, soft and flexible to imitate the shape of the breast. The anti-colic valve prevents air from entering the baby?s stomach during breastfeeding.