---
title: "Kilner Jars — £426K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/kilner-jars"
last_updated: "2026-08-01T04:06:24.421Z"
locale: en
meta:
description: "Niche score 39/100 · £426K/yr market · 576K searches/yr · £8.66 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 39/100 · £426K/yr market · 576K searches/yr · £8.66 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Kilner Jars — £426K/yr Amazon UK Niche (2026) - Flapen"
---
# **kilner jars**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 57Growth 18Conversion 81Competition 19Returns 96Price range 35Avg price 24Brand share 0Review moat 41Quality gap 24
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****8.6%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****£426K**
£426K/yr · 576K searches
**Review moat**
**Okay****2,380.69**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Okay****£2.27–£22.00**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Bad****£8.66**
avg listing price — sweet spot $15–$100
**Competition**
**Bad****77%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-15.0%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
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.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kilner jars market data**
- **Units sold / yr**
- **60K–80K**
- avg 2,000–2,500/product
- **Revenue / yr**
- **£520K–£693K**
- units × avg price
- **Conversion rate**
- **8.6%**
- **Avg BSR**
- **#19**
- **Page quality**
- **0%**
- **Prime**
- **85%**
- **Sponsored**
- **8%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **34 months**
- **Avg seller age**
- **180 days**
## **Competition & brand share**
The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.
**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 & seasonality**
Weekly Amazon search volume, last 104 weeks — -15.0% search growth over the last 90 days.
15K10KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/uk/home-garden/kilner-jars/trend)
## **Top kilner jars search terms**
- **kilner jars**390K/yr-15.4%8.3% conv. - **kilner**95K/yr-15.0%2.3% conv. - **kilner jar**66K/yr-14.5%9.7% conv. - **kilner clip top jars**5K/yr-13.7%7.8% conv. - **kilner jars uk**4K/yr+4.8%4.0% conv. - **glass kilner jars**3K/yr+17.9%7.3% conv. - **kilner storage jars**5K/yr-35.7%4.0% conv. - **kilner preserving jars**4K/yr+58.3%6.9% conv. - **killer jar**3K/yr-28.9%6.0% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/kilner-jars/search-terms)
## **Top kilner jars 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%10%£43K20%£85K30%£128K40%£170K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kilner Clip Top Jar 1 Litre (1000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta**Kilner**£3.45**4.7★5,001 rev](https://www.amazon.co.uk/dp/B0030FUHR8) [2**Kilner Clip Top Jar 2 Litre (2000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta**Kilner**£5.00**4.7★5,686 rev](https://www.amazon.co.uk/dp/B003Y7MS6U) [3**Kilner Preserve Jar 0.5L (500ml) Round Glass Screw Top Lid Preservation Storage Jar for Jams Chutneys Small Pickled Fruits**Kilner**£2.27**4.6★3,565 rev](https://www.amazon.co.uk/dp/B0030G0FG0) [4**Kilner Set of 3 Round Clip Top Jars 0.5 Litre (3 x 500ml) Airtight Glass Storage Jars for Preserving Jams Dry Foods Reusable**Kilner**£10.41**4.7★816 rev](https://www.amazon.co.uk/dp/B096G8BQYL) [5**Kilner Preserve Jar 1L (1000ml) Round Glass Screw Top Lid Preservation Storage Jar for Pickling Vegetables Whole Fruits Chunky Chutneys**Kilner**£2.88**4.6★2,474 rev](https://www.amazon.co.uk/dp/B007FT5C5W)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**HEFTMAN Clip Top Glass Jars Set of 6-1 Litre Airtight Glass Jars with Lids & Silicone Seal for Pasta Sourdough Starter Chutney Pickling Kitchen Organisation - Empty Food Storage Jar Set (6 Pack)**HEFTMAN**£17.18**159 rev1y ago](https://www.amazon.co.uk/dp/B0FH2ZNWRL) [**Kilner Square Clip Top Jar 250ml (0.25L) Airtight Glass Jar for Storing Herbs Spices Dried Fruits Nuts and Seeds**Kilner**£4.54**77 rev2y ago](https://www.amazon.co.uk/dp/B0C6KWR532) [**Kilner Square Clip Top Jar 3L (3000ml) Airtight Glass Jar for Preserving Whole Fruits Vegetables and Storing Cereals Pasta Nests Pet Biscuits**Kilner**£10.70**160 rev2y ago](https://www.amazon.co.uk/dp/B0CGJ6CNG1) [**Kilner Square Clip Top Jar Set of 3 1 Litre (1000ml) Airtight Glass Jars for Storing Coffee Beans Pickling Vegetables Chutneys Pasta Nuts BPA-Free Dishwasher Safe**Kilner**£12.80**510 rev4y ago](https://www.amazon.co.uk/dp/B09QXNXJ2X) [**Kilner Set of 3 Round Clip Top Jars 0.5 Litre (3 x 500ml) Airtight Glass Storage Jars for Preserving Jams Dry Foods Reusable**Kilner**£10.41**816 rev5y ago](https://www.amazon.co.uk/dp/B096G8BQYL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Kilner Square Clip Top Jar 250ml (0.25L) Airtight Glass Jar for Storing Herbs Spices Dried Fruits Nuts and Seeds**Kilner**£4.54**4.4★**▲ 207%**](https://www.amazon.co.uk/dp/B0C6KWR532) [**Kilner Clip Top Jar 2 Litre (2000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta**Kilner**£5.00**4.7★**▲ 68%**](https://www.amazon.co.uk/dp/B003Y7MS6U) [**Kilner Square Clip Top Jar 3L (3000ml) Airtight Glass Jar for Preserving Whole Fruits Vegetables and Storing Cereals Pasta Nests Pet Biscuits**Kilner**£10.70**4.5★**▲ 63%**](https://www.amazon.co.uk/dp/B0CGJ6CNG1) [**Kilner Preserve Jar 1L (1000ml) Round Glass Screw Top Lid Preservation Storage Jar for Pickling Vegetables Whole Fruits Chunky Chutneys**Kilner**£2.88**4.6★**▲ 30%**](https://www.amazon.co.uk/dp/B007FT5C5W) [**Kilner Clip Top Jar 1 Litre (1000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta**Kilner**£3.45**4.7★**▲ 19%**](https://www.amazon.co.uk/dp/B0030FUHR8)
**~~View all trending →~~**
## **What buyers say about kilner jars**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**26%
*“Great producT”*
**Value For Money**15%
*“Great value”*
**Size-Overall**14%
*“Excellent jars in all sizes”*
**Storage Capacity**9%
*“great storage capacity”*
**Advertised Vs Actual Product**6%
*“Does the job”*
**Strength**5%
*“It's sturdy as well”*
**Ease Of Use**5%
*“easy to use”*
**Leak-Proof**3%
*“Doesnt leak,”*
**Durability**3%
*“durable”*
**Ease Of Cleaning**2%
*“Easy to clean”*
### **What buyers complain about **
**Quality-Overall**20%
*“Not great quality glass”*
**Durability**14%
*“Breaks Easily”*
**Size-Overall**13%
*“Not fit for purpose”*
**Rusts/Corrodes**7%
*“Lid rusts”*
**Advertised Vs Actual Product**5%
*“Misleading”*
**Ease Of Use**4%
*“very stiff to open and close, take it will get easier with time”*
**Smell**4%
*“Do not keep smells in the jar the best”*
**Leak-Proof**4%
*“not leak proof”*
**Strength**3%
*“lids very fragile one fell apart while using”*
**Design-Overall**3%
*“I dont like the lid be nice if it was a different design”*
### **Top return reasons **
**Size-Overall**64%
**Defective Material/Parts**13%
**Advertised Vs Actual Product**3%
**Quality-Overall**3%
**Ease Of Use**2%
**Shape/Style**2%
**Functionality-Overall**2%
**Maintenance And Repair**2%
**Compatibility-Overall**2%
**Value For Money**1%
## **Common questions**
- **Is kilner jars profitable to sell on Amazon United Kingdom?**
- The niche generates £426K/yr across 13 tracked products. 90-day search growth is -15.0%. Flapen's verdict: Skip it (39/100).
- **How competitive is the kilner jars niche?**
- 2 brands and 47 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in kilner jars?**
- Top complaints mined from reviews: Quality-Overall, Durability, Size-Overall. The return rate is 0.8%.
- **When does demand for kilner jars peak?**
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- **What does it cost to enter the kilner jars niche?**
- Listings span £2.27–£22.00; the average listing price is £8.66 (sweet spot $15–$100). The average incumbent carries 2,381 reviews — the moat a new listing must climb.
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