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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

An estimated 8.6% of those searches ended in a purchase.

Shoppers searched for this 576K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 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

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 27, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 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

Est. top-5 brand share

100%

Top 20: 100%

Est. 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 estimated 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

We read the reviews and the return reasons for every product selling here.

26%of positive reviews mention “Quality-Overall”
20%of negative reviews mention “Quality-Overall”
0.8%of orders come back
“Not great quality glass”
A buyer, on “Quality-Overall”20% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

18 topics

NegativePositive

FAQ

Common Kilner Jars questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data