---
title: "valve — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/baby-products/valve"
last_updated: "2026-07-13T22:44:18.819Z"
locale: en
meta:
  description: "a concentrated shelf (top 5 take 85% of clicks) — valve doesn't clear our bar today."
  "og:description": "a concentrated shelf (top 5 take 85% of clicks) — valve doesn't clear our bar today."
  "og:title": "valve — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
---

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# **valve**

**Skip it**

A concentrated shelf (top 5 take 85% of clicks) — this niche doesn't clear our bar today.

Market size 35Growth 13Conversion 54Competition 12Returns 70Price range 81Avg price 82Brand share 13Review moat 37Quality gap 65

**Avg price**

**Great****$17.79**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$9.68–$41.19**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Returns**

**Good****2.2%**

return rate — above 6% kills the launch gate

**Quality gap**

**Good****4.4★**

avg incumbent rating — lower means beatable quality

**Conversion**

**Good****4.4%**

search→purchase rate — share of searches ending in a sale

**Review moat**

**Okay****2,815.7**

avg incumbent reviews — the moat a new listing must climb

**Market size**

**Okay****$168K**

$168K/yr · 213K searches

**Growth**

**Bad****-24.9%**

90-day search growth — must beat 0% to launch

**Brand share**

**Bad****95%**

top-5 brand share — brand-locked demand

**Competition**

**Bad****85%**

top-5 click share — a locked-up shelf

## **Competition**

The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**7 **▲rising

**Sellers**

**13**

**Top-5 brand share**

**95%**

**Open market**

**3%**

- Legendairy Milk65% - Nursi Luna11% - Momcozy8% - Elvie7% - Nuliie4% - Mompmuir3% - Open — no brand owns it (1 brand, 3%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%15%$25K30%$50K45%$76K60%$101K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 10 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Legendairy Milk Duckbill Valves with Pull Tab - Compatible with Spectra S1 S2 9 Plus Medela Motif Baby Buddha & Zomee - Duckbill Valve Replacement Pump Parts BPA Free Silicone 6 Pack](https://m.media-amazon.com/images/I/41LdFP3ZeeL.jpg)**Legendairy Milk Duckbill Valves with Pull Tab - Compatible with Spectra S1 S2 9 Plus Medela Motif Baby Buddha & Zomee - Duckbill Valve Replacement Pump Parts BPA Free Silicone 6 Pack**Legendairy Milk**$11.76**4.4★1,673 rev](https://www.amazon.com/dp/B08MWQQN6W) [2![Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA](https://m.media-amazon.com/images/I/41jVtVQZVZL.jpg)**Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA**Legendairy Milk**$24.77**4.5★1,557 rev](https://www.amazon.com/dp/B0BYB2C15M) [3![Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**4.6★2,006 rev](https://www.amazon.com/dp/B0CKZH37FX) [4![Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size](https://m.media-amazon.com/images/I/410IrfxgswL.jpg)**Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size**Momcozy**$41.19**4.3★691 rev](https://www.amazon.com/dp/B0D66JT3LS) [5![Elvie Nipple Cushions 17mm | Soft-Silicone Nipple Cushions to Enhance fit for Improved Comfort and Efficiency (2 Pack)](https://m.media-amazon.com/images/I/31JgQ9djzzL.jpg)**Elvie Nipple Cushions 17mm | Soft-Silicone Nipple Cushions to Enhance fit for Improved Comfort and Efficiency (2 Pack)**Elvie**$20.20**4.2★486 rev](https://www.amazon.com/dp/B0C7FLCLCH)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size](https://m.media-amazon.com/images/I/410IrfxgswL.jpg)**Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size**Momcozy**$41.19**691 rev2y ago](https://www.amazon.com/dp/B0D66JT3LS) [![Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms](https://m.media-amazon.com/images/I/41TicDjnz7L.jpg)**Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping BPA-Free Essential for Moms**Nursi Luna**$9.87**2,081 rev2y ago](https://www.amazon.com/dp/B0CY81WHD5) [![Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**2,006 rev2y ago](https://www.amazon.com/dp/B0CKZH37FX) [![Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms](https://m.media-amazon.com/images/I/41Feyi97wML.jpg)**Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms**Nuliie**$9.68**4,179 rev2y ago](https://www.amazon.com/dp/B0CMPBBHMZ) [![Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA](https://m.media-amazon.com/images/I/41jVtVQZVZL.jpg)**Legendairy Milk Pumping Spray 4 oz. Helps Sore Nipples & Clogged Ducts Organic Lubricant for Breast Shields and Flanges Vegan Breast Pump Spray Natural & Lanolin-Free Made in USA**Legendairy Milk**$24.77**1,557 rev3y ago](https://www.amazon.com/dp/B0BYB2C15M)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size](https://m.media-amazon.com/images/I/410IrfxgswL.jpg)**Momcozy 999 Silver Nursing Cups Original Perforated Breathable Design 999 Silver Nipple Cover for Breastfeeding Essential Nipple Shield for Nursing Newborn Metal Nipple Shields Regular Size**Momcozy**$41.19**4.3★**▲ 297%**](https://www.amazon.com/dp/B0D66JT3LS) [![Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms](https://m.media-amazon.com/images/I/415xYbVux6L.jpg)**Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps Flange Sizing Kit Silicone Flanges Insert Breastfeeding Essentials Kit for New Moms**Nursi Luna**$10.05**4.6★**▲ 53%**](https://www.amazon.com/dp/B0CKZH37FX) [![Durceler 17mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 17mm](https://m.media-amazon.com/images/I/21mPu6AlMlL.jpg)**Durceler 17mm Silicone Flange Inserts Compatible with Medela/for Spectra S1 S2 / Elvie / S18 S21 / Momcozy S9 S12/ TSRETE 24mm Breast Pump Shields or Freemie 25mm; Reduce Nipple Tunnel Down to 17mm**Durceler**$14.59**4.2★**▲ 41%**](https://www.amazon.com/dp/B09MK9NCNN) [![Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms](https://m.media-amazon.com/images/I/41Feyi97wML.jpg)**Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort BPA-Free Essential for Moms**Nuliie**$9.68**4.6★**▲ 26%**](https://www.amazon.com/dp/B0CMPBBHMZ) [![Legendairy Milk Liquid Gold Lactation Support | Lactation Supplement with Organic Goats Rue Milk Thistle Shatavari Fennel Alfalfa & Anise | Breastfeeding Supplements 1 Pack](https://m.media-amazon.com/images/I/414prtlybCL.jpg)**Legendairy Milk Liquid Gold Lactation Support | Lactation Supplement with Organic Goats Rue Milk Thistle Shatavari Fennel Alfalfa & Anise | Breastfeeding Supplements 1 Pack**Legendairy Milk**$21.18**4.1★**▲ 12%**](https://www.amazon.com/dp/B084GRS9JB)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — -24.9% search growth over the last 90 days.

6K4KHoliday '24Spike '25Black Friday '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: Jan, Jun · busiest ÷ quietest = 2.0×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**18%

*“The best sizing kit”*

**Quality-Overall**14%

*“Good quality”*

**Ease Of Use**10%

*“Easy to take”*

**Breastfeeding Friendly**8%

*“Lactation support”*

**Comfort-Overall**6%

*“So comfortable”*

**Value For Money**6%

*“Good value for money”*

**Ease Of Cleaning**6%

*“its been such a lifesaver for keeping clean”*

**Durability**3%

*“they are pretty durable”*

**Color**3%

*“Love the color”*

**Advertised Vs Actual Product**3%

*“It performs exactly as intended”*

### **What buyers complain about **

**Functionality-Overall**17%

*“Didn't work”*

**Value For Money**10%

*“Not worth it”*

**Size-Overall**9%

*“These are huge”*

**Leak-Proof**8%

*“They all leak”*

**Quality-Overall**4%

*“Poor Quality”*

**Comfort-Overall**3%

*“Very uncomfortable”*

**Acid Regulator/Stomach Ache Relief**3%

*“stomach pain Ive ever had”*

**Durability**3%

*“when I was drying them after a clean they bent easily”*

**Regulates Digestion**3%

*“baby very gassy”*

**Taste-Overall**2%

*“Doesn't have a taste”*

### **Top return reasons **

**Size-Overall**46%

**Functionality-Overall**9%

**Leak-Proof**9%

**Advertised Vs Actual Product**5%

**Defective Material/Parts**5%

**Value For Money**3%

**Comfort-Overall**3%

**Breastfeeding Friendly**3%

**Motor Power**2%

**Material Quality**2%