Dr. Brown’s Natural Flow® Narrow Baby Bottle Silicone Nipple, (2-Pack Level 4) 9 Months Plus
Exclusively for Dr. Brown's natural flow baby bottles
Made of super-soft, silicone
Each nipple level provides a different flow rate
All of these bottle nipples vary in size and shape
Find the bottle nipple that's the perfect fit for your baby's feeding needs
Replacement silicone nipple 3-packs for Dr. Brown's natural flow and reg, baby bottles preemie flow for and nbsp, premature babies. All of our nipples are super-soft, made of high-grade silicone in Germany. 3-Pack of preemie flow nipples.
🍼 Product Overview & Features
Flow Level & Age Range
Level 4 represents the fastest standard flow in the Narrow nipple line, designed for infants aged about 9 months and older, especially those transitioning to solids or higher intake needs.
Each Level 4 nipple delivers approximately 50% more flow than Level 3 nipple, supporting efficient, comfortable feeding.
Material & Design
Made from super-soft 100% silicone (BPA-, PVC-, and phthalate-free), gentle yet durable. Compatible with all Dr. Brown’s Standard Narrow-Neck
The nipple features a breast-like shape to help promote a natural latch and make transitioning between breast and bottle smoother.
Anti-Colic System
Works with Dr. Brown’s patented internal vent system, enabling vacuum‑free feeding. This helps minimize air ingestion, reducing gas, spit-up, burping, and preserving nutrients like vitamins A, C, and E.
Cleaning & Safety
Dishwasher safe (top rack only), plus compatible with electric/microwave sterilizers and boiling water for easy care
Comes in a 2‑nipple pack, making replacements or backups convenient.
📊 Summary Table
FeatureDetailsFlow LevelLevel 4 — Fast Flow, nominally 9 months+Comparative Speed~50% faster than Level 3MaterialSuper-soft 100% silicone (BPA‑free)CompatibilityDr. Brown’s Standard Narrow-Neck bottlesAnti‑Colic SystemInternal vent for vacuum-free feedingCleaningDishwasher, sterilizer, boiling safePack Size2 nipples
✅ Advantages & Ideal Use
Offers efficient, high-volume feeding for older infants who can handle faster milk flow. Not ideal for younger infants or those still building feeding coordination.
Consistent flow rate across bottles ensures reliability and predictability feeding after
Vacuum-free vent design helps maintain nutrients and reduce colic symptoms—making feeding more comfortable for both baby and parent.
⚠️ Considerations & Parent Feedback
Too fast for some babies: Many parents report that Level 4 can cause dribbling, coughing, or choking if introduced before the baby is developmentally ready. Slow, paced introduction is recommended.
Flow sensitivity with preparation: In some cases, nipple openings may widen slightly if the nipple is stretched or damaged during cleaning, accelerating flow unpredictably.
Dripping noted with narrow-necks: Due to the vent design, narrow Dr. Brown’s bottles can drip even when upright—often considered a feature of the design, not a defect.
👶 When to Use Level 4
🎯 Consider Level 4 if:
Your baby is about 9 months or older and no longer frustrated by slower flows.
They handle thicker liquids or larger volumes comfortably.
You're using complementary feeding and tube supplements, and baby needs faster bottle feeding.
You observe long feeding times, fussiness, or fatigue on slower nipples.
💡 Tips for Transition
Introduce gradually—try Level 4 for one feed per day while continuing paced feeding.
Watch baby’s cues—look for signs like increased spit-up, coughing, or gurgling to indicate speed is too fast.
Inspect nipple condition—avoid over-stretching or tearing the Y‑shaped opening, which can cause unintended faster flow.
Ensure correct vent assembly—aligning vent parts properly supports smooth suction and prevents leaks or dribbles.
✅ Final Verdict
The Dr. Brown’s Natural Flow Level 4 Narrow Silicone Nipple (9 Months+, 2‑Pack) provides a fast-paced, consistent feeding option for babies with advancing feeding needs. With a gentle, breast-like silicone build and vacuum-free venting, it supports efficient, comfortable nutrition delivery. While suitable for many older infants, it’s essential to assess baby’s readiness and introduce this level cautiously to avoid feeding distress or choking.
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