Skip to content

Kilner Jars

brand-locked demand (top 5 brands take 100% of clicks) — Kilner Jars doesn't clear our bar today.

Flapen Score

39
Skip it

Ranks 4,947 of 5,777 Home & Garden niches · −12 vs the category median of 51

Market size 57Growth 18Conversion 81Competition 19Returns 96Price range 35Avg price 24Brand share 0Review moat 41Quality gap 24
This niche Category average · 5,777 niches

Is Kilner Jars profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Kilner Jars is a £426K/yr Amazon United Kingdom market (576K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 39/100.

Kilner Jars: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Not really. Search demand moved -15.0% over the last 90 days and 8.6% of searches end in a purchase.

£426K

revenue / yr

Units sold / yr80K
Search volume / yr-15.0%576K
Conversion rate8.6%
Avg price£8.66

Who owns the niche?

The top 5 brands hold 100% of demand, so 0% of the market is open.

0%

open market share

Brands · sellers2 · 47
Top-5 product click share77%
Open market0%
Avg brand age34 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.6★ — the gap to enter on.

0/100

page quality · 13 products

Sponsored placement8%
New entrants (1y)0· 0 succeeded
Avg rating4.6★
Avg reviews2,381

Top Kilner Jars products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

£0£43K£85K£128K£170K101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

2 falling

Sellers

47

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

77%

Top 20: 100%

Open market

0%

  • Kilner98%
  • HEFTMAN2%
  • Open — no brand owns it (0%)

Kilner Jars demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume576KCVR8.6%Products13Brands2Top 5 Brands100%OOS Rate0.0%Rating4.6★Reviews2,381Avg BSR#19
15K10KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.6×

Top Kilner Jars search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • kilner jars390K/yr
  • kilner95K/yr
  • kilner jar66K/yr
  • kilner clip top jars5K/yr
  • kilner jars uk4K/yr
  • glass kilner jars3K/yr
  • kilner storage jars5K/yr
  • kilner preserving jars4K/yr
  • killer jar3K/yr

What reviews say buyers love and hate about Kilner Jars

What buyers mention most, as a share of all reviews.

What buyers love

87% of reviews
Quality-Overall26%

Great producT

Value For Money15%

Great value

Size-Overall14%

Excellent jars in all sizes

Storage Capacity9%

great storage capacity

Advertised Vs Actual Product6%

Does the job

What buyers complain about

78% of reviews
Quality-Overall20%

Not great quality glass

Durability14%

Breaks Easily

Size-Overall13%

Not fit for purpose

Rusts/Corrodes7%

Lid rusts

Advertised Vs Actual Product5%

Misleading

Kilner Jars return rate & reasons

Why buyers send it back, as a share of all return requests.

0.8%

Return rate

74%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Size-Overall
64%
2Defective Material/Parts
13%
3Advertised Vs Actual Product
3%
4Quality-Overall
3%
5Ease Of Use
2%

Common Kilner Jars questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Kilner Jars 39/100 on Amazon United Kingdom — Skip it. The niche generates £426K/yr across 13 tracked products. Search demand moved -15.0% over the last 90 days.
Search demand for Kilner Jars on Amazon United Kingdom is steady year-round — the busiest month runs 1.6× the quietest.