small flask
Skip itSoft demand (-20.0% this quarter) — this niche doesn't clear our bar today.
Returns
Great1.6%return rate — above 5% kills the launch gate
Competition
Great39%top-5 click share — an open shelf
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Price range
Good£6.27–£26.47cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good75%top-5 brand share — brands hold most of the demand
Conversion
Okay3.0%search→purchase rate — share of searches ending in a sale
Avg price
Okay£9.87avg listing price — sweet spot $15–$100
Review moat
Bad6,063.67avg incumbent reviews — the moat a new listing must climb
Market size
Bad£75K£75K/yr · 255K searches
Growth
Bad-20.0%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, small flask is a £75K/yr Amazon United Kingdom market (255K searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Jan–Nov. Verdict: Skip it — 46/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
small flask market data
- Units sold / yr
- 8K–10K
- avg 100–250/product
- Revenue / yr
- £79K–£99K
- units × avg price
- Conversion rate
- 3.0%
- Avg BSR
- #203
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 69%
- Out of stock
- 0.8%
- Avg brand age
- 46 months
- Avg seller age
- 179 days
Competition & brand share
Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen.Brands
28 falling
Sellers
83
Top-5 brand share
75%
Top 20: 95%
Top-5 click share
39%
Top 20: 71%
Open market
23%
- Exllena31%
- Thermos30%
- YUEHAI6%
- YDYxieji5%
- MILTON3%
- DJDL3%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -20.0% search growth over the last 90 days.Peak months: Jan, Nov · busiest ÷ quietest = 1.9×
Top small flask search terms
- small flask47K/yr
- small thermos flasks33K/yr
- small flask for hot drinks36K/yr
- mini flask24K/yr
- small coffee flask13K/yr
- milk flask10K/yr
- small thermos flasks for hot drinks12K/yr
- small thermos flask9K/yr
- small flask for milk8K/yr
- small thermos10K/yr
Top small 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
Exllena Small Flask 150ml Made of 304 Stainless Steel Double Wall Vacuum Insulation for Hot&Cold Drinks Mini Flask with Carry Handle - 100% Leakproof(Mint)
Exllena£7.624.4★3,311 rev
ThermoCafe Stainless Steel 500ml Flask
Thermos£8.244.6★22,004 rev
Upgraded Exllena Small Water Bottle for Handbag 250ml Small Flask for Hot & Cold Drinks Perfect Small Insulated Water Bottle for Travel Milk Coffee... (Black)
Exllena£10.104.3★1,328 rev
Thermos 181114 ThermoCafé Stainless Steel Flask Multicolour 0.35 L
Thermos£6.914.6★3,681 rev
Thermos - Light and Compact Flask (350ml) - Premium Leak Proof Insulated Tea & Coffee Flask for Hot & Cold Drinks Built-in Cup Push Button Stopper BPA-Free Durable Steel
Thermos£12.504.6★12,218 rev
Newest
by launch date
Exllena 250ml Mini Thermal Flask 100% Leakproof Pocket Travel Mug for Flat White Coffee & Tea Slim Stainless Steel Small Water Bottle for Handbag Commute Milk BPA Free(Dusty Green)
Exllena£10.8699 rev
300ml Small Flask Reusable Vacuum Insulated Stainless Steel Insulated Tumbler Water Bottle with Leakproof Lid for Hot & Cold Drinks Portable Coffee Mug for Travel (Black)
YDYxieji£6.3826 rev
Spotzyllic 2 Pcs 150ml Small Thermos Flask Stainless Steel Water Bottle Keeps Cold 12H/Hot 8H Leak Proof Insulated Cup for Travel Handbag Gift for Couples (Black+Metallic)
Spotzyllic£9.9411 rev
Exllena Upgraded Small Water Bottle for Handbag 250ml Mini Flask for Hot & Cold Drinks Perfect Small Insulated Water Bottle for Travel Milk Coffee...(Pink)
Exllena£10.091,328 rev
Upgraded Exllena Small Water Bottle for Handbag 250ml Small Flask for Hot & Cold Drinks Perfect Small Insulated Water Bottle for Travel Milk Coffee... (Black)
Exllena£10.101,328 rev
Trending
90-day click momentumExllena 250ml Mini Thermal Flask 100% Leakproof Pocket Travel Mug for Flat White Coffee & Tea Slim Stainless Steel Small Water Bottle for Handbag Commute Milk BPA Free(Dusty Green)
Exllena£10.863.8★
Exllena Small Flask 250ml Made of 304 Stainless Steel Double Wall Vacuum Insulation for Hot&Cold Drinks Mini Flask with Carry Handle - 100% Leakproof (Pink)
Exllena£9.284.4★
Spotzyllic 2 Pcs 150ml Small Thermos Flask Stainless Steel Water Bottle Keeps Cold 12H/Hot 8H Leak Proof Insulated Cup for Travel Handbag Gift for Couples (Black+Metallic)
Spotzyllic£9.944.6★
300ml Small Flask Reusable Vacuum Insulated Stainless Steel Insulated Tumbler Water Bottle with Leakproof Lid for Hot & Cold Drinks Portable Coffee Mug for Travel (Black)
YDYxieji£6.384.3★
Exllena Small Flask 250ml Water Bottle Made of 304 Stainless Steel Double Wall Vacuum Insulation for Hot&Cold Drinks Mini Flask with Carry Handle - 100% Leakproof (Grayish Blue)
Exllena£9.434.4★
What buyers say about small flask
What buyers praise and complain about, mined from review topics.What buyers love
“Very useful size”
“Great for keeping drink cold”
“solid build quality”
“Doesn't leak”
“Meets expectations”
“Good price”
“Useful”
“Love the colour, love the size and shape”
“keeps hot things hot”
“Practical, maintains temperature all day long”
What buyers complain about
“Doesnt hold heat as described”
“Too small”
“leaks”
“Didn't last a week”
“It is a bit pricey”
“Poor quality”
“do not work as advertised”
“the heat retention falls short of expectations”
“top of all of that its an absolute pain to clean”
“Item a bit badly manufactured”
Top return reasons
Common questions
- Is small flask profitable to sell on Amazon United Kingdom?
- The niche generates £75K/yr across 55 tracked products. 0 of 12 products launched in the last 360 days are still selling. 90-day search growth is -20.0%. Flapen's verdict: Skip it (46/100).
- How competitive is the small flask niche?
- 28 brands and 83 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 75% of demand.
- What do buyers complain about in small flask?
- Top complaints mined from reviews: Heating, Size-Overall, Leak-Proof. The return rate is 1.6%.
- When does demand for small flask peak?
- Demand peaks in Jan–Nov; the busiest month runs 1.9× the quietest.
- What does it cost to enter the small flask niche?
- Listings span £6.27–£26.47; the average listing price is £9.87 (sweet spot $15–$100). The average incumbent carries 6,064 reviews — the moat a new listing must climb.