soft flask
Worth a lookShows a sweet-spot price point ($21.15 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Avg price
Great$21.15avg listing price — sweet spot $15–$100
Price range
Great$9.20–$43.84cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good553.85avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Competition
Good49%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
Okay3.9%search→purchase rate — share of searches ending in a sale
Brand share
Okay76%top-5 brand share — brands hold most of the demand
Returns
Okay3.1%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
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.Peak months: May · busiest ÷ quietest = 1.9×
Top soft flask search terms
- soft flask85K/yr
- soft flask running bottles49K/yr
- aonijie running vest43K/yr
- soft water bottles34K/yr
- running flask29K/yr
- hydration flask18K/yr
- aonijie24K/yr
- soft water bottle22K/yr
- 500ml soft flask17K/yr
- flexible water bottle16K/yr
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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SWIFTER 2x Soft Flask 500ml | Running Hiking Cycling Hydration Flask | Collapsible Leakproof Reusable | Matt Finish Sky Blue
SWIFTER$15.884.5★349 rev
WILDREEDS 500ml Soft Flask TPU Collapsible Soft Water Bottle for Hydration Pack Running Vest Folding Water Bottle for Hiking Cycling Climbing-1Pcs White
WILDREEDS$9.844.2★533 rev
AXEN 500ML Soft Flask TPU Foldable Running Hydration Flask Soft Collapsible Water Bottle for Hydration Pack Cycling Marathon Running Hiking
AXEN$9.444.2★615 rev
HydraPak SoftFlask 250ml 2-Pack - Collapsible Nutrition Flask - BPA Free Easy Open Locking Cap Foldable Lightweight
HydraPak$24.334.2★807 rev
HydraPak SkyFlask Speed - Collapsible Handheld Running Water Bottle (350ml) - Adjustable Strap Lightweight Spill-Proof Cap
HydraPak$26.524.2★1,205 rev
Newest
by launch date
Osprey Hydraulics 500ml Soft Flask Water Bottle - Collapsible Hydration Flask - Lightweight for Running Vests & Belts
Osprey$19.0030 rev
HydraPak SoftFlask Speed 500ml - Compressible Soft Flask Water Bottle Perfect Fit for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)
HydraPak$21.58166 rev
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$17.66130 rev
HydraPak SoftFlask Speed 500ml 2-Pack - Compressible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)
HydraPak$22.73166 rev
HydraPak SoftFlask 250ml 2-Pack - Collapsible Nutrition Flask - BPA Free Easy Open Locking Cap Foldable Lightweight
HydraPak$24.33807 rev
Trending
90-day click momentumHydraPak SoftFlask Speed 500ml 2-Pack - Compressible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)
HydraPak$22.734.4★
Osprey Hydraulics 500ml Soft Flask Water Bottle - Collapsible Hydration Flask - Lightweight for Running Vests & Belts
Osprey$19.004.6★
HydraPak SoftFlask Speed 500ml - Compressible Soft Flask Water Bottle Perfect Fit for Hydration Vests and Running Packs with Easy Open Cap (500ml/17oz)
HydraPak$21.584.4★
HydraPak SoftFlask 250ml 2-Pack - Collapsible Nutrition Flask - BPA Free Easy Open Locking Cap Foldable Lightweight
HydraPak$24.334.2★
HydraPak SkyFlask Speed - Collapsible Handheld Running Water Bottle (350ml) - Adjustable Strap Lightweight Spill-Proof Cap
HydraPak$26.524.2★
What buyers say about soft flask
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to use”
“Leak proof”
“I have found this lightweight”
“Super handy and portable”
“Handy size”
“good quality water bottle”
“Great durability”
“Easy to clean”
“Great all-around water bottle”
“way cheaper”
What buyers complain about
“it was leaking”
“Awkward and difficult to use”
“not happy how it fits together”
“had a chemical smell”
“This product is cheap”
“The water wasted all over me”
“kinda misleading, unsure how it fair the pricing is”
“doesnt stand up”
“The seams did not seem sturdy”
“broke on first use”
Top return reasons
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.