# Dr\. Brown's Narrow Bottle Nipples and Colic Claims Which of these Dr\. Brown's narrow bottle nipples are stated to help with colic? Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple, Level Preemie, 2\-Pack: The maker page repeats that the silicone nipple with the anti\-colic internal vent system is clinically proven to reduce colic and decrease spit\-up, burping and gas\. Together with the anti\-colic internal vent system, the nipple and bottle are described as clinically proven to reduce colic and decrease spit\-up, burping and gas\. Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple, Level 4, 2\-Pack: Dr\. Brown's repeats that the silicone nipple with the anti\-colic internal vent system is clinically proven to reduce colic\. With the anti\-colic internal vent system the nipple is stated to be clinically proven to reduce colic\. Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple: The nipple used with the Anti\-Colic internal vent system is described as clinically proven to reduce colic\. ### 1. [Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple, Level Preemie, 2\-Pack](/products/ucp/drbrownsbaby-com/9206214459669) (sold by drbrownsbaby\.com) The maker page repeats that the silicone nipple with the anti\-colic internal vent system is clinically proven to reduce colic and decrease spit\-up, burping and gas\. - Colic claim: The maker page repeats that the silicone nipple with the anti\-colic internal vent system is clinically proven to reduce colic and decrease spit\-up, burping and gas\. (guide) - Material: The nipple is super\-soft 100% silicone and fits all Dr\. Brown's narrow bottles\. (listing) ### 2. [Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple, Level 4, 2\-Pack](/products/ucp/drbrownsbaby-com/9139833602325) (sold by drbrownsbaby\.com) Dr\. Brown's repeats that the silicone nipple with the anti\-colic internal vent system is clinically proven to reduce colic\. - Colic claim: Dr\. Brown's repeats that the silicone nipple with the anti\-colic internal vent system is clinically proven to reduce colic\. (manual) - Material: The nipple is made of super\-soft 100% silicone\. (guide) ### 3. [Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple](/products/ucp/drbrownsbaby-com/9139833536789) (sold by drbrownsbaby\.com) The nipple used with the Anti\-Colic internal vent system is described as clinically proven to reduce colic\. - Colic claim: The nipple used with the Anti\-Colic internal vent system is described as clinically proven to reduce colic\. (listing) - Material: Each nipple is made from 100% silicone\. (listing) ## Also cited in the text - Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple, Level Preemie, 2\-Pack, anti\-colic claim: Together with the anti\-colic internal vent system, the nipple and bottle are described as clinically proven to reduce colic and decrease spit\-up, burping and gas\. (listing) - Dr\. Brown's Natural Flow Narrow Baby Bottle Silicone Nipple, Level 4, 2\-Pack, colic claim: With the anti\-colic internal vent system the nipple is stated to be clinically proven to reduce colic\. (guide) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-11T19:47:35.805Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)