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Kilner Jars

Fail

The top 5 brands take 100% of clicks, so Kilner Jars is a Fail.

Flapen Score
39
39 / 100
Ranks 4,947 of 5,777 Home & Garden niches · −12 vs the category median of 51
Market size
£426K/yr576K searches / yr
90-day growth
-15.0%search demand this quarter
Competition
77%top-5 click share · 2 brands · 47 sellers

Flapen Score

Kilner Jars against its category

The dotted line is the Home & Garden average. Past it, Kilner Jars is stronger. Inside it, weaker.

39Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Kilner Jars market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Kilner Jars 576K times last year and spent an estimated £426K. All 2 brands take every click. Flapen scores it 39 out of 100, a Fail.

01 · Demand

8.6% of searches ended in a purchase last week.

Shoppers searched for this 576K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 8.6% of those searches ended in a purchase. Searches in the last 90 days moved -15.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated £426K a year.

Searches, last 12 months
576K
Growth, 90 days vs prior 90
-15.0%
Conversion, latest week
8.6%
Market size, estimated
£426Ka year
Peak month
October1.6× the quietest month
Top search term
kilner jars390K searches a year

02 · Price

A sale here is worth £8.66.

Listings sell for £8.66 on average, from £2.27 to £22.00. Amazon reports units sold in ranges. This niche sold 60K to 80K a year. The average listing sells 2,000 to 2,500 of them. At £8.66 that is £17K to £22K a year per listing.

Average price
£8.66under the $15 to $100 sweet spot
Price range
£2.27–£22.00
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
60K–80K
Units per listing a year
2,000–2,500
Revenue per listing a year
£17K–£22K
Returns
0.8%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

8% of listings pay for placement with sponsored ads. 85% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #19 within Food Storage. It carries 2,381 reviews at 4.62 stars, so a new listing needs social proof before a better product.

Sponsored listings
8%
Prime listings
85%
Out of stock, average day
0.0%
Average rank
#19in Food Storage
Average rating
4.62 starsAmazon United Kingdom average 4.36 stars
Average reviews
2,381per listing
Listings tracked
13

04 · Newcomers

Brands here are young.

The brands on the shelf have sold for 34 months on average, so a newcomer is not facing entrenched names.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
34 months

Products

Top Kilner Jars products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 77% of clicks. A locked 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%)

Demand

Kilner Jars search demand

Weekly searches over the year, seasonality beneath. Pick a range.

15K10KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.6×

Search terms

Top Kilner Jars search terms shoppers use

The exact words 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

Reviews and returns

What reviews say buyers love and hate about Kilner Jars

What buyers praise, what they complain about and why they send it back, from the reviews.

Complain

Quality-Overall20%−0.01

Not great quality glass

Not good quality, cheap imatation

Poor quality

Durability14%−0.08

Breaks Easily

Broke after 2 uses

The jar cracked within a week of using it

Size-Overall13%+1.08

Not fit for purpose

Theyre a little larger than expected

a smaller one next time

Rusts/Corrodes7%−0.06

Lid rusts

it started rusting

lids rust instantly

Advertised Vs Actual Product5%+0.24

Misleading

The listing is very misleading

The dimensions provided don't give enough information and are misleading

Love

Quality-Overall26%−0.01

Great producT

Excellent product

Good quality glass product

Value For Money15%+1.45

Great value

Great value

Money well spent

Size-Overall14%+1.08

Excellent jars in all sizes

they fit perfectly for me

Good size for my needs

Storage Capacity9%+1.00

great storage capacity

A useful storage jar

Good storage

Advertised Vs Actual Product6%+0.24

Does the job

As described

Exactly what I needed

Return

0.8% Return rate 74% Fixable by listing

Size-Overall64%▇▇▇█▇█

Not fit for purpose

Theyre a little larger than expected

a smaller one next time

Defective Material/Parts13%▆▆▆▆█▆
Advertised Vs Actual Product3%▆▁█▂▂▅

Misleading

The listing is very misleading

The dimensions provided don't give enough information and are misleading

Quality-Overall3%▂▂▁▁█▃

Not great quality glass

Not good quality, cheap imatation

Poor quality

Ease Of Use2%▅█▅▆▆█

very stiff to open and close, take it will get easier with time

making it completely impossible for a toddler to confidently open or close the jar without the whole thing falling apart

its not practicle to use

FAQ

Common Kilner Jars questions

Answered from the same tracked data.