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54

shampoo cap

Worth a look

Shows low returns (0.4%), but soft demand (-9.6% this quarter) keeps it on the watch list.

Market size 56Growth 20Conversion 96Competition 26Returns 98Price range 24Avg price 42Brand share 59Review moat 46Quality gap 73

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Conversion

Incredible13.9%

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

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Brand share

Good70%

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

Market size

Good£420K

£420K/yr · 272K searches

Review moat

Okay1,914.5

avg incumbent reviews — the moat a new listing must climb

Avg price

Okay£11.07

avg listing price — sweet spot $15–$100

Competition

Okay70%

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

Price range

Bad£3.17–£18.76

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

Growth

Bad-9.6%

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

According to Flapen's Amazon United Kingdom niche tracking, shampoo cap is a £420K/yr Amazon United Kingdom market (272K searches/yr). The top 5 brands hold 70% of demand. Verdict: Worth a look — 54/100.

Data updated Jul 21, 2026 · scored weekly · How we score niches

shampoo cap market data

Units sold / yr
30K–40K
avg 2,000–2,500/product
Revenue / yr
£332K–£443K
units × avg price
Conversion rate
13.9%
Avg BSR
#398
Page quality
0%
Prime
92%
Sponsored
83%
Out of stock
6.3%
Avg brand age
43 months
Avg seller age
177 days

Competition & brand share

The top 5 products take 70% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 flat

Sellers

21

Top-5 brand share

70%

Top 20: 100%

Top-5 click share

70%

Top 20: 100%

Open market

23%

  • Omnitex19%
  • ALIA16%
  • Medcosa13%
  • Self Care11%
  • Luxura10%
  • Dymacare8%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -9.6% search growth over the last 90 days.
6K4KSpike '25Prime Day '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Top shampoo cap search terms

  • shampoo caps no rinse for elderly44K/yr
  • shampoo cap79K/yr
  • hair wash caps no water rinse free27K/yr
  • shampoo caps26K/yr
  • no rinse shampoo cap19K/yr
  • hair washing caps13K/yr
  • shampoo caps for bed bound to wash hair8K/yr
  • rinse free shampoo cap8K/yr
  • waterless shampoo cap4K/yr
  • hair wash cap7K/yr
All search terms

Top shampoo cap 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%£21K10%£42K15%£63K20%£84K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 12 tracked products in this niche — three views at once, no toggling.

What buyers say about shampoo cap

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

What buyers love

Ease Of Use25%

“it was easy to put on”

Quality-Overall14%

“Reliable product”

Smell11%

“clean smells good highly recommend this seller”

Ease Of Cleaning6%

“Cleans beautifully and no mess”

Soft Feel5%

“Hair is so soft”

Advertised Vs Actual Product4%

“Does what it says”

Value For Money4%

“Good value for money”

Efficiency4%

“Does the job”

Hair Styling3%

“Really clever and effective way of freshening the hair”

Cleansing3%

“Hair feels clean”

What buyers complain about

Oily/Greasy11%

“still Greasy”

Moist/Dry10%

“Those saying the cap is dry”

Value For Money7%

“Waste of money”

Quality-Overall6%

“Absolute rubbish”

Adhesion/Stickiness5%

“No stickiness yet”

Suitability Long Hair5%

“I wish I'd left my hair as it was”

Hair Related4%

“Awful hair felt worse”

Residue4%

“They do leave a bit of residue which is why I haven't given them a 5 star”

Ease Of Cleaning4%

“dirty would not recommend zero stars if I could”

Allergies4%

“Allergic Reaction”

Top return reasons

Functionality-Overall18%
Advertised Vs Actual Product7%
Damage/Burn Hair7%
Durability7%
Oily/Greasy6%
Size-Overall5%
Hair Related4%
Quality-Overall4%
Suitability Short Hair3%
Ease Of Use3%

Common questions

Is shampoo cap profitable to sell on Amazon United Kingdom?
The niche generates £420K/yr across 12 tracked products. 90-day search growth is -9.6%. Flapen's verdict: Worth a look (54/100).
How competitive is the shampoo cap niche?
12 brands and 21 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 70% of demand.
What do buyers complain about in shampoo cap?
Top complaints mined from reviews: Oily/Greasy, Moist/Dry, Value For Money. The return rate is 0.4%.
When does demand for shampoo cap peak?
Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the shampoo cap niche?
Listings span £3.17–£18.76; the average listing price is £11.07 (sweet spot $15–$100). The average incumbent carries 1,915 reviews — the moat a new listing must climb.