1. Applicable to all standard feeding bottle of any brands.
2. Made of high quality, food grade silicone, which is soft, and will not cause injury to the baby's oral cavity and gum.
3. The unique ventilation valve design provides a smooth flow by its ventilation system.
The prominent rib design inside the straw ensures the flow to be provided smoothly even when it is bent or compressed, as it avoids the straw from being blocked or stuck.