Dr. Brown’s Natural Flow Level 2 Narrow Nipples (6-Pack) Review: A Reliable Step-Up for Growing Babies

Introduction

The Dr. Brown’s Natural Flow Level 2 Narrow Baby Bottle Silicone Nipple, Medium Flow (3m+, 6-count) is designed as the next stage for babies who are ready to move beyond slow-flow newborn nipples. Built to work with Dr. Brown’s narrow-neck anti-colic bottles, this 100% silicone nipple aims to provide a more natural, comfortable feeding experience while maintaining the brand’s well-known focus on reducing gas, spit-up, and colic.

If you already use Dr. Brown’s narrow bottles and are looking for a medium-flow option, this 6-pack is a practical way to refresh worn nipples or outfit multiple bottles at once. On Amazon ($10.99), it’s positioned as a convenience upgrade for families already invested in the Dr. Brown’s system.

Key Points

Flow level and age range: Level 2 is a medium-flow nipple intended for babies around 3 months and older, though the ideal timing depends on the individual baby’s feeding pace and comfort.
Anti-colic system compatibility: Designed specifically for Dr. Brown’s narrow bottles and their internal vent system, helping to reduce colic, spit-up, burping, and gas.
Material and feel: Made from super-soft, 100% silicone, with a breast-like shape to support a proper latch and more natural bottle-feeding experience.
Consistent flow: Each Level 2 nipple is engineered to deliver a clinically consistent flow rate, so bottle performance is predictable as you rotate through the 6-pack.
Care and cleaning: Safe for the top rack of the dishwasher and compatible with electric and microwave sterilizers or boiling water, which simplifies daily maintenance.
Pack size: The 6-count configuration offers good value and convenience for households that use multiple bottles per day.

Experience

Design and compatibility

These Level 2 nipples are tailored for Dr. Brown’s narrow-neck bottles only. They are not interchangeable with wide-neck bottles from Dr. Brown’s or other brands. For parents already using the narrow Dr. Brown’s system, the fit is straightforward: the nipple seats into the collar, which then screws onto the bottle with the internal vent in place.

The narrow design and silicone material give a familiar feel for babies coming from Level 1 Dr. Brown’s nipples. The nipple shape is described as breast-like, helping babies maintain a good latch and supporting combination feeding (breast and bottle) without dramatically changing the way they suck.

Flow performance

Level 2 offers a noticeable step up from Level 1 without jumping to a very fast flow. In practice, this means:

Babies who are struggling to finish bottles, getting frustrated, or collapsing the nipple on Level 1 may benefit from the medium flow of Level 2.
The flow is designed to remain vacuum-free when used with the internal vent system, which helps babies feed at their own pace without needing to fight extra suction.

However, some babies—especially smaller or more sensitive feeders—may find Level 2 too fast initially, leading to coughing, gulping, or increased spit-up. Because feeding needs vary widely, it’s often best to trial Level 2 during a calm feeding and watch closely for signs of discomfort, then adjust back to Level 1 if needed.

Anti-colic performance

The Level 2 nipple is part of Dr. Brown’s broader anti-colic design. When used with the narrow bottles and internal vent, it helps keep air out of the milk, which can:

Reduce gas, burping, and spit-up.
Support better digestion and comfort, especially for babies prone to colic-like symptoms.

Parents who already see benefits from Dr. Brown’s bottles generally report that moving up to Level 2 retains those advantages, with the primary change being a faster, more age-appropriate flow.

Durability and cleaning

The nipples are made of 100% silicone, which is:

Durable under frequent washing and sterilizing.
Resistant to odors and staining compared with some other materials.

They can be cleaned in the top rack of the dishwasher, sterilized in electric or microwave sterilizers, or boiled, making them suitable for a range of hygiene routines. Over time, like all silicone nipples, they can become cloudy or show signs of wear; the 6-pack format makes it easy to replace nipples at reasonable intervals rather than stretching a single pair too long.

Pack size and value

The 6-count pack is convenient if you:

Use multiple bottles throughout the day and want spare nipples ready to go.
Prefer to rotate nipples frequently for hygiene and wear reasons.

Because it’s sold as a multi-pack, the per-nipple cost is usually lower than buying smaller packs, and the $10.99 price point on Amazon is competitive with other branded, anti-colic-compatible nipples in the same category.

Pros

Medium flow for growing babies: Appropriate for many babies around 3 months and up who have outgrown slower Level 1 nipples.
Works with Dr. Brown’s anti-colic system: Specifically designed for Dr. Brown’s narrow bottles and vent system, helping maintain the brand’s colic, gas, and spit-up reduction benefits.
Soft, 100% silicone construction: Gentle on babies’ mouths and gums; resists odor and staining and stands up well to repeated sterilization.
Consistent and predictable flow: Each nipple in the pack is designed to match the Level 2 flow standard, making bottle performance uniform across bottles.
Breast-like shape: Supports a proper latch and can help ease transitions between breast and bottle.
Dishwasher and sterilizer safe: Straightforward cleaning routine that fits common household setups.
Economical 6-pack format: Provides ample spares and typically better per-nipple value than smaller packs.

Cons

Brand lock-in: Only compatible with Dr. Brown’s narrow-neck bottles; not suitable for wide-neck bottles or most other brands, which limits flexibility.
Flow may be too fast for some babies: Sensitive or younger infants may still need Level 1 or even preemie-level nipples, and a rapid switch to Level 2 can lead to gulping or increased spit-up.
More parts compared with simpler bottles: Because these nipples are part of a system that includes an internal vent, total cleaning and assembly time can be higher than with minimalist bottle designs.
Wear over time: Like all silicone nipples, they need periodic replacement as they cloud, thin, or lose shape with heavy use.

Verdict

The Dr. Brown’s Natural Flow Level 2 Narrow Baby Bottle Silicone Nipple (6-count) is a strong choice for families already invested in Dr. Brown’s narrow anti-colic bottles and looking for a reliable medium-flow option. It maintains the system’s focus on reducing colic and gas, offers a gentle, silicone-based feeding experience, and provides a consistent flow across all six nipples in the pack.

It’s not a universal solution—babies vary, and some will remain more comfortable on Level 1 for longer, while others may move quickly to faster flows. It’s also limited to Dr. Brown’s narrow bottles, so it won’t suit parents who want to mix and match brands. But for its intended audience—parents satisfied with Dr. Brown’s bottles and ready to step up nipple flow—this Level 2, 6-pack configuration delivers convenience, predictable performance, and overall solid value at around $10.99.