---
title: "Soft Flask — $362K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/sports-outdoors/soft-flask"
last_updated: "2026-08-11T17:42:30.269Z"
locale: en
meta:
description: "Niche score 59/100 · $362K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 59/100 · $362K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Soft Flask — $362K/yr Amazon US Niche (2026) - Flapen"
---
# **soft flask**
**Worth a look**
Shows a sweet-spot price point ($21.15 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 54Growth 54Conversion 49Competition 60Returns 48Price range 82Avg price 90Brand share 49Review moat 74Quality gap 67
**Avg price**
**Great****$21.15**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.20–$43.84**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****553.85**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Competition**
**Good****49%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Good****$362K**
$362K/yr · 439K searches
**Growth**
**Good****+26.2%**
90-day search growth — must beat 0% to launch
**Conversion**
**Okay****3.9%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****76%**
top-5 brand share — brands hold most of the demand
**Returns**
**Okay****3.1%**
return rate — above 5% kills the launch gate
According to Flapen's Amazon United States niche tracking, soft flask is a $362K/yr Amazon United States market (439K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in May. Verdict: Worth a look — 59/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **soft flask market data**
- **Units sold / yr**
- **15K–20K**
- avg 250–500/product
- **Revenue / yr**
- **$317K–$423K**
- units × avg price
- **Conversion rate**
- **3.9%**
- **Avg BSR**
- **#209**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **79%**
- **Out of stock**
- **10.8%**
- **Avg brand age**
- **43 months**
- **Avg seller age**
- **159 days**
## **Competition & brand share**
The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**15 **▼falling
**Sellers**
**29**
**Top-5 brand share**
**76%**
Top 20: 100%
**Top-5 click share**
**49%**
Top 20: 86%
**Open market**
**19%**
- HydraPak23% - SWIFTER17% - WILDREEDS15% - AONIJIE13% - AXEN9% - Salomon5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +26.2% search growth over the last 90 days.
13K8KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/us/sports-outdoors/soft-flask/trend)
## **Top soft flask search terms**
- **soft flask**85K/yr+31.0%2.8% conv. - **soft flask running bottles**49K/yr+21.8%3.7% conv. - **aonijie running vest**43K/yr+11.7%0.7% conv. - **soft water bottles**34K/yr+15.2%2.5% conv. - **running flask**29K/yr+17.5%3.1% conv. - **hydration flask**18K/yr+56.7%3.0% conv. - **aonijie**24K/yr+5.0%0.7% conv. - **soft water bottle**22K/yr+24.8%1.8% conv. - **500ml soft flask**17K/yr+44.6%6.3% conv. - **flexible water bottle**16K/yr+0.6%2.2% conv. [**All search terms **](https://flapen.com/research/us/sports-outdoors/soft-flask/search-terms)
## **Top soft flask products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%5%$18K10%$36K15%$54K20%$72K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SWIFTER 2x Soft Flask 500ml | Running Hiking Cycling Hydration Flask | Collapsible Leakproof Reusable | Matt Finish Sky Blue**SWIFTER**$15.88**4.5★349 rev](https://www.amazon.com/dp/B0D63MZQ97) [2**WILDREEDS 500ml Soft Flask TPU Collapsible Soft Water Bottle for Hydration Pack Running Vest Folding Water Bottle for Hiking Cycling Climbing-1Pcs White**WILDREEDS**$9.84**4.2★533 rev](https://www.amazon.com/dp/B0CTKFL3NY) [3**AXEN 500ML Soft Flask TPU Foldable Running Hydration Flask Soft Collapsible Water Bottle for Hydration Pack Cycling Marathon Running Hiking**AXEN**$9.44**4.2★615 rev](https://www.amazon.com/dp/B0CB7QP684) [4**HydraPak SoftFlask 250ml 2-Pack - Collapsible Nutrition Flask - BPA Free Easy Open Locking Cap Foldable Lightweight**HydraPak**$24.33**4.2★807 rev](https://www.amazon.com/dp/B0G4XL8461) [5**HydraPak SkyFlask Speed - Collapsible Handheld Running Water Bottle (350ml) - Adjustable Strap Lightweight Spill-Proof Cap**HydraPak**$26.52**4.2★1,205 rev](https://www.amazon.com/dp/B0FWTP7LCC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Osprey Hydraulics 500ml Soft Flask Water Bottle - Collapsible Hydration Flask - Lightweight for Running Vests & Belts**Osprey**$19.00**30 rev7mo ago](https://www.amazon.com/dp/B0FGY2XRW2) [**HydraPak SoftFlask Speed 500ml - Compressible Soft Flask Water Bottle Perfect Fit for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)**HydraPak**$21.58**166 rev7mo ago](https://www.amazon.com/dp/B0G6NGK625) [**HydraPak PocketFlask 500ml - Compressible Low Profile Soft Flask Water Bottle Ideal Fit for Run Belts and Form Fitting Pockets with Locking Cap (500ml/17oz)**HydraPak**$17.66**130 rev7mo ago](https://www.amazon.com/dp/B0G6NM1TQQ) [**HydraPak SoftFlask Speed 500ml 2-Pack - Compressible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)**HydraPak**$22.73**166 rev7mo ago](https://www.amazon.com/dp/B0G6MZG7LX) [**HydraPak SoftFlask 250ml 2-Pack - Collapsible Nutrition Flask - BPA Free Easy Open Locking Cap Foldable Lightweight**HydraPak**$24.33**807 rev7mo ago](https://www.amazon.com/dp/B0G4XL8461)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**HydraPak SoftFlask Speed 500ml 2-Pack - Compressible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)**HydraPak**$22.73**4.4★**▲ 118%**](https://www.amazon.com/dp/B0G6MZG7LX) [**Osprey Hydraulics 500ml Soft Flask Water Bottle - Collapsible Hydration Flask - Lightweight for Running Vests & Belts**Osprey**$19.00**4.6★**▲ 113%**](https://www.amazon.com/dp/B0FGY2XRW2) [**HydraPak SoftFlask Speed 500ml - Compressible Soft Flask Water Bottle Perfect Fit for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)**HydraPak**$21.58**4.4★**▲ 98%**](https://www.amazon.com/dp/B0G6NGK625) [**HydraPak SoftFlask 250ml 2-Pack - Collapsible Nutrition Flask - BPA Free Easy Open Locking Cap Foldable Lightweight**HydraPak**$24.33**4.2★**▲ 97%**](https://www.amazon.com/dp/B0G4XL8461) [**HydraPak SkyFlask Speed - Collapsible Handheld Running Water Bottle (350ml) - Adjustable Strap Lightweight Spill-Proof Cap**HydraPak**$26.52**4.2★**▲ 51%**](https://www.amazon.com/dp/B0FWTP7LCC)
**~~View all trending →~~**
## **What buyers say about soft flask**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**10%
*“Easy to use”*
**Leak-Proof**10%
*“Leak proof”*
**Weight Light**9%
*“I have found this lightweight”*
**Portability**9%
*“Super handy and portable”*
**Size-Overall**8%
*“Handy size”*
**Quality-Overall**7%
*“good quality water bottle”*
**Durability**4%
*“Great durability”*
**Ease Of Cleaning**3%
*“Easy to clean”*
**Water Resistance**3%
*“Great all-around water bottle”*
**Value For Money**3%
*“way cheaper”*
### **What buyers complain about **
**Leak-Proof**27%
*“it was leaking”*
**Ease Of Use**7%
*“Awkward and difficult to use”*
**Size-Overall**6%
*“not happy how it fits together”*
**Smell**5%
*“had a chemical smell”*
**Quality-Overall**4%
*“This product is cheap”*
**Water Resistance**3%
*“The water wasted all over me”*
**Value For Money**3%
*“kinda misleading, unsure how it fair the pricing is”*
**Strength**2%
*“doesnt stand up”*
**Stitch/Finish/Polish**2%
*“The seams did not seem sturdy”*
**Durability**2%
*“broke on first use”*
### **Top return reasons **
**Size-Overall**47%
**Leak-Proof**15%
**Advertised Vs Actual Product**5%
**Value For Money**4%
**Material Quality**3%
**Smell**3%
**Ease Of Use**2%
**Functionality-Overall**2%
**Weight Heavy**2%
**Quality-Overall**2%
## **Common questions**
- **Is soft flask profitable to sell on Amazon United States?**
- The niche generates $362K/yr across 33 tracked products. 8 of 10 products launched in the last 360 days are still selling. 90-day search growth is +26.2%. Flapen's verdict: Worth a look (59/100).
- **How competitive is the soft flask niche?**
- 15 brands and 29 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 76% of demand.
- **What do buyers complain about in soft flask?**
- Top complaints mined from reviews: Leak-Proof, Ease Of Use, Size-Overall. The return rate is 3.1%.
- **When does demand for soft flask peak?**
- Demand peaks in May; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the soft flask niche?**
- Listings span $9.20–$43.84; the average listing price is $21.15 (sweet spot $15–$100). The average incumbent carries 554 reviews — the moat a new listing must climb.
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