Is thermos flask profitable to sell on Amazon United Kingdom?

The niche generates £1.2M/yr across 34 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -22.9%. Flapen's verdict: Skip it (49/100).

How competitive is the thermos flask niche?

15 brands and 95 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 89% of demand.

What do buyers complain about in thermos flask?

Top complaints mined from reviews: Heating, Leak-Proof, Quality-Overall. The return rate is 1.5%.

When does demand for thermos flask peak?

Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 2.4× the quietest.

What does it cost to enter the thermos flask niche?

Listings span £6.97–£37.66; the average listing price is £15.87 (sweet spot $15–$100). The average incumbent carries 15,007 reviews — the moat a new listing must climb.

thermos flask

Skip it

Soft demand (-22.9% this quarter) — this niche doesn't clear our bar today.

Returns

Great1.5%

return rate — above 5% kills the launch gate

Market size

Great£1.2M

£1.2M/yr · 2.9M searches

Avg price

Great£15.87

avg listing price — sweet spot $15–$100

Price range

Good£6.97–£37.66

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

Competition

Good52%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Conversion

Okay2.6%

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

Brand share

Okay89%

top-5 brand share — brands hold most of the demand

Review moat

Bad15,006.5

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-22.9%

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

According to Flapen's Amazon United Kingdom niche tracking, thermos flask is a £1.2M/yr Amazon United Kingdom market (2.9M searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Jan–Oct–Nov–Dec. Verdict: Skip it — 49/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

thermos flask market data

Units sold / yr: 60K–80K; avg 2,000–2,500/product
Revenue / yr: £952K–£1.3M; units × avg price
Conversion rate: 2.6%
Avg BSR: #90
Page quality: 0%
Prime: 97%
Sponsored: 79%
Out of stock: 0.0%
Avg brand age: 46 months
Avg seller age: 169 days

Competition & brand share

The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

Top-5 brand share

89%

Top 20: 100%

Top-5 click share

52%

Top 20: 86%

Open market

Thermos74%
MILTON8%
Contigo3%
THERMOcafé by THERMOS3%
Jumkeet2%
STANLEY1%
Open — no brand owns it (9 brands, 9%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -22.9% search growth over the last 90 days.

Peak months: Jan, Oct, Nov, Dec · busiest ÷ quietest = 2.4×

Open Trend

Top thermos flask search terms

thermos flask779K/yr -26.6%2.4% conv.
flask658K/yr -23.8%1.7% conv.
flask for hot drink408K/yr -32.5%2.3% conv.
thermos341K/yr -18.6%1.3% conv.
flasks for hot and cold drinks70K/yr +95.8%1.2% conv.
hot water flask75K/yr -24.6%1.9% conv.
thermal flask79K/yr -30.8%1.6% conv.
stainless steel flask25K/yr +192.4%0.7% conv.
flasks61K/yr -23.8%1.1% conv.
thermos flask for hot drinks52K/yr -35.4%2.6% conv.

All search terms

Top thermos 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.

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

Thermos - Stainless King Midnight Blue Travel Flask (1.2L) Premium Leak Proof Insulated Tea & Coffee Flask Hot & Cold Drinks Built-in Cup Twist-Pour Stopper BPA-Free Durable Steel

Thermos£20.004.7★24,566 rev

Thermos - Stainless King Red Travel Flask (1.2L) - Premium Leak Proof Insulated Tea & Coffee Flask for Hot & Cold Drinks Built-in Cup Twist-Pour Stopper BPA-Free Durable Steel

Thermos£19.164.7★24,566 rev

Thermos Stainless King 470ml Multi-Purpose Thermos Flask - Original-Style Flask can be used as Travel Mug or Insulated Water Bottle for Daily Commute & Weekend Adventures Matt Black

Thermos£14.294.7★5,636 rev

ThermoCafe Stainless Steel 500ml Flask

Thermos£8.244.6★22,004 rev

THERMOcafè by THERMOS Stainless Steel Flask Multi-colour 1.0 Litre

Thermos£11.974.6★22,004 rev

Newest

by launch date

Bargain Factory Water Flask Double Walled Vacuum Insulated Flask 500ml Leakproof 24 Hours Hot and Cold Water Bottle Durable Stainless-Steel Interior and Exterior Silver

BARGAIN FACTORY£6.97291 rev

2y ago

Water Bottle Otto Koning 1L - 1 Litre Stainless Steel Vacuum Insulated Flask - Keeps Cold 24h / Hot 12h - Large Leak Proof & BPA Free Metal Drinks Bottle for Gym Hiking & Sports

Otto Koning£8.6010,532 rev

2y ago

QiCheng&LYS 500ML Travel Mug with Temperature Display 304 Stainless Steel Double Walled Vacuum Insulation Cup for Heat and Cold Water(Pink)

QiCheng&LYS£10.101,236 rev

5y ago

Contigo Byron SNAPSEAL Travel Mug 470 ml

Contigo£8.0723,825 rev

7y ago

YJ&H Double Walled Vacuum Insulated Bottle with Cup - Stainless Steel Thermo Flask - Reusable Drinking Water Bottles BPA Free - for Kids & Adult Sports Outdoor Office - 650ml Champagne Gold

YJH£10.554,998 rev

7y ago

What buyers say about thermos flask

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

What buyers love

Quality-Overall21%

“Good quality bottle”

Temperature Retention18%

“Keeps water cool as it states”

Value For Money8%

“Good Value”

Leak-Proof7%

“Does not leak”

Heating6%

“Keeps heat etc”

Size-Overall5%

“Good size”

Advertised Vs Actual Product4%

“As advertised”

Ease Of Use3%

“Easy to use”

Temperature Control3%

“Very good as all Thermos”

Durability3%

“Will not break”

What buyers complain about

Heating18%

“doesn't retain heat well”

Leak-Proof13%

“this one leaks”

Quality-Overall8%

“Bad quality”

Durability7%

“it broke during first use”

Value For Money7%

“Ok just overpriced”

Size-Overall5%

“Small”

Advertised Vs Actual Product3%

“Not as advertised”

Temperature Retention3%

“doez not keep drinks hot at all”

Temperature Control2%

“Doesn't really keep the water at a hot temperature”

Ease Of Use2%

“difficult to hold”

Top return reasons

Size-Overall61%

Leak-Proof8%

Heating3%

Weight Heavy2%

Defective Material/Parts2%

Color2%

Quality-Overall2%

Functionality-Overall2%

Value For Money1%

Temperature Control1%

Common questions

Is thermos flask profitable to sell on Amazon United Kingdom?: The niche generates £1.2M/yr across 34 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -22.9%. Flapen's verdict: Skip it (49/100).
How competitive is the thermos flask niche?: 15 brands and 95 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 89% of demand.
What do buyers complain about in thermos flask?: Top complaints mined from reviews: Heating, Leak-Proof, Quality-Overall. The return rate is 1.5%.
When does demand for thermos flask peak?: Demand peaks in Jan–Oct–Nov–Dec; the busiest month runs 2.4× the quietest.
What does it cost to enter the thermos flask niche?: Listings span £6.97–£37.66; the average listing price is £15.87 (sweet spot $15–$100). The average incumbent carries 15,007 reviews — the moat a new listing must climb.