---
title: "Soft Flask — £122K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/sports-outdoors/soft-flask"
last_updated: "2026-07-31T21:09:13.378Z"
locale: en
meta:
description: "Niche score 56/100 · £122K/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 56/100 · £122K/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 — £122K/yr Amazon UK Niche (2026) - Flapen"
---
# **soft flask**
**Worth a look**
Shows low returns (1.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 28Growth 39Conversion 65Competition 57Returns 95Price range 50Avg price 35Brand share 58Review moat 73Quality gap 80
**Returns**
**Great****1.0%**
return rate — above 5% kills the launch gate
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Good****595.4**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****5.7%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****70%**
top-5 brand share — brands hold most of the demand
**Competition**
**Good****51%**
top-5 click share — leaders hold, buyers still browse
**Price range**
**Good****£2.71–£27.30**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+11.3%**
90-day search growth — must beat 0% to launch
**Avg price**
**Okay****£10.19**
avg listing price — sweet spot $15–$100
**Market size**
**Okay****£122K**
£122K/yr · 209K searches
According to Flapen's Amazon United Kingdom niche tracking, soft flask is a £122K/yr Amazon United Kingdom market (209K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Worth a look — 56/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **soft flask market data**
- **Units sold / yr**
- **13K–15K**
- avg 250–500/product
- **Revenue / yr**
- **£127K–£153K**
- units × avg price
- **Conversion rate**
- **5.7%**
- **Avg BSR**
- **#248**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **97%**
- **Out of stock**
- **1.2%**
- **Avg brand age**
- **31 months**
- **Avg seller age**
- **179 days**
## **Competition & brand share**
The top 5 products take 51% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**17 **▼falling
**Sellers**
**26**
**Top-5 brand share**
**70%**
Top 20: 100%
**Top-5 click share**
**51%**
Top 20: 88%
**Open market**
**23%**
- Salomon22% - SWIFTER19% - WRELS13% - flintronic9% - Generic8% - UTOBEST6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +11.3% search growth over the last 90 days.
6K4KSpike '25Prime Day '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 3.0×
[**Open Trend **](https://flapen.com/research/uk/sports-outdoors/soft-flask/trend)
## **Top soft flask search terms**
- **soft flask**33K/yr+8.1%3.5% conv. - **running water pouch**23K/yr+7.5%4.7% conv. - **soft water bottle**25K/yr+1.2%3.7% conv. - **soft flask 500ml**15K/yr+42.2%5.9% conv. - **salomon soft flask 500ml**9K/yr+184.2%9.3% conv. - **500ml soft flask**9K/yr+58.0%7.3% conv. - **running vest water bottle**13K/yr-11.1%5.8% conv. - **soft water bottle running**11K/yr-5.0%5.2% conv. - **running bottle soft**5K/yr+35.3%5.9% conv. - **soft running water bottle**9K/yr+3.5%4.0% conv. [**All search terms **](https://flapen.com/research/uk/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%£6K10%£12K15%£18K20%£24K101001K10K 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 | Collapsible Running Water Bottle | Handheld or in Vest | Leakproof | Trail Hydration Flask | Soft Water Bottle for Marathon Hiking**SWIFTER**£12.59**4.5★340 rev](https://www.amazon.co.uk/dp/B0D63MZQ97) [2**Salomon Soft Flask 500ml/17oz 42 Unisex Hydration accessory Easy to use Comfort High-flow valve Clear Blue**Salomon**£12.32**4.5★866 rev](https://www.amazon.co.uk/dp/B09P2NZ88T) [3**Salomon Soft Flask 250ml/8oz 28 Unisex Hydration Accessories Comfort High-flow Valve and Easy to Use Blue**Salomon**£10.59**4.5★993 rev](https://www.amazon.co.uk/dp/B09P2JZ996) [4**Lightweight Leakproof Soft Flask - 500ml Foldable Collapsible Water Bottle for Running Vest & Belt BPA-Free TPU for Trail Running Hiking Cycling Outdoor Sports (Blue)**Generic**£5.97**3.8★10 rev](https://www.amazon.co.uk/dp/B0FD9LND7N) [5**WRELS 200ml/350ml/500ml Collapsible Soft Flask BPA Free Folding Soft Water Bottle with Hanging Ring Lightweight TPU Hydration Flask for Running Marathon Cycling Hiking(200ml-2 Packs)**WRELS**£8.99**4.4★173 rev](https://www.amazon.co.uk/dp/B0DD3XPRS1)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Lightweight Leakproof Soft Flask - 500ml Foldable Collapsible Water Bottle for Running Vest & Belt BPA-Free TPU for Trail Running Hiking Cycling Outdoor Sports (Blue)**Generic**£5.97**10 rev4mo ago](https://www.amazon.co.uk/dp/B0FD9LND7N) [**Flintronic TPU Foldable Water Bottle Soft Flask 250ml BPA-Free for Hydration on Backpacks Bicycles Hiking Jogging Camping and Climbing (Light Blue)**flintronic**£5.83**224 rev9mo ago](https://www.amazon.co.uk/dp/B0DMSNQWPZ) [**Trekkrs 2 Pack Soft Flask Water Bottles - 500 ml | Leakproof Design | Soft Foldable Running Water Bottle | Running Hydration Bladder Pouch | 2 x Straw Lids 2 x Regular Lids & Easy Cleaning Sachets**Trekkrs**£14.07**64 rev1y ago](https://www.amazon.co.uk/dp/B0FC6KXQPZ) [**TREKKOUT Collapsible Water Bottle 2-Pack 500ml Soft Flask for Running Vest - Leak-Proof Foldable Hydration Flask for Trail Running Marathon Hiking - BPA-Free & Easy Clean**TREKKOUT**£11.03**70 rev1y ago](https://www.amazon.co.uk/dp/B0F6WGYMJQ) [**Flintronic TPU Foldable Water Bottles 2-Piece Soft Flask BPA-Free for Hydration on Backpacks Bicycles Hiking Jogging Camping and Climbing (250ml Light Blue)**flintronic**£7.39**224 rev1y ago](https://www.amazon.co.uk/dp/B0F2FBP2T5)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**DORNNA 2X1 Soft Flask BPA FREE Hydration Bottle for Running Sports Hydration Bag Reusable Water Bottle Very Resistant (500ML - 2 PCS)**DORNNA**£9.73**4.4★**▲ 178%**](https://www.amazon.co.uk/dp/B0CCN2LPLF) [**Lightweight Leakproof Soft Flask - 500ml Foldable Collapsible Water Bottle for Running Vest & Belt BPA-Free TPU for Trail Running Hiking Cycling Outdoor Sports (Blue)**Generic**£5.97**3.8★**▲ 142%**](https://www.amazon.co.uk/dp/B0FD9LND7N) [**TENTRA 2x Soft Flask 500ml | Running Hiking Cycling Water Bottle | Collapsible Leakproof Lightweight**TENTRA**£9.91**4.6★**▲ 91%**](https://www.amazon.co.uk/dp/B0DJ35LHHC) [**WRELS 200ml/350ml/500ml Collapsible Soft Flask BPA Free Folding Soft Water Bottle with Hanging Ring Lightweight TPU Hydration Flask for Running Marathon Cycling Hiking(200ml-2 Packs)**WRELS**£8.99**4.4★**▲ 72%**](https://www.amazon.co.uk/dp/B0DD3XPRS1) [**UTOBEST Soft Flask 250ml Collapsible Running Water Bottles**UTOBEST**£9.73**4.3★**▲ 48%**](https://www.amazon.co.uk/dp/B07SZT25LT)
**~~View all trending →~~**
## **What buyers say about soft flask**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**20%
*“Good quality”*
**Size-Overall**14%
*“Great size”*
**Leak-Proof**14%
*“Does not leak”*
**Ease Of Use**7%
*“Easy to use”*
**Value For Money**4%
*“Overall its worth buying”*
**Advertised Vs Actual Product**4%
*“does the job”*
**Exercise/Sports Suitability**3%
*“Perfect for runners. or walkers”*
**Weight Light**3%
*“Lightweight and easy to roll up small”*
**Durability**3%
*“Seems durable”*
**Efficiency**3%
*“worked well”*
### **What buyers complain about **
**Leak-Proof**30%
*“Leaks too easily”*
**Strength**5%
*“Overprice and flimsy”*
**Quality-Overall**5%
*“Not the best”*
**Ease Of Use**5%
*“am unfortunately unable to use it”*
**Rusts/Corrodes**5%
*“There's a metal ring which rusts horrible rusty taste in my mouth”*
**Ease Of Cleaning**4%
*“Cleaning isnt the easiest”*
**Size-Overall**4%
*“Smaller than hoped for”*
**Water Resistance**4%
*“Cannot make water come out of them”*
**Washability**3%
*“Wash before use”*
**Smell**3%
*“Strong Plastic Smell Was Unpleasant”*
### **Top return reasons **
**Size-Overall**46%
**Leak-Proof**26%
**Advertised Vs Actual Product**4%
**Smell**3%
**Functionality-Overall**3%
**Quality-Overall**2%
**Strength**2%
**Value For Money**1%
**Pockets/Compartments**1%
**Ease Of Use**1%
## **Common questions**
- **Is soft flask profitable to sell on Amazon United Kingdom?**
- The niche generates £122K/yr across 30 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +11.3%. Flapen's verdict: Worth a look (56/100).
- **How competitive is the soft flask niche?**
- 17 brands and 26 sellers compete. The top 5 products take 51% of clicks and top 5 brands hold 70% of demand.
- **What do buyers complain about in soft flask?**
- Top complaints mined from reviews: Leak-Proof, Strength, Quality-Overall. The return rate is 1.0%.
- **When does demand for soft flask peak?**
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 3.0× the quietest.
- **What does it cost to enter the soft flask niche?**
- Listings span £2.71–£27.30; the average listing price is £10.19 (sweet spot $15–$100). The average incumbent carries 595 reviews — the moat a new listing must climb.
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