---
title: "Kilner Jars 0.5l — £46K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/kilner-jars-0-5l"
last_updated: "2026-08-01T04:06:53.073Z"
locale: en
meta:
description: "Niche score 37/100 · £46K/yr market · 26K searches/yr · £9.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 37/100 · £46K/yr market · 26K searches/yr · £9.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Kilner Jars 0.5l — £46K/yr Amazon UK Niche (2026) - Flapen"
---
# **kilner jars 0.5l**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 11Growth 15Conversion 99Competition 31Returns 97Price range 45Avg price 33Brand share 0Review moat 48Quality gap 25
**Conversion**
**Incredible****17.6%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.6%**
return rate — above 5% kills the launch gate
**Review moat**
**Okay****1,748.22**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Okay****£2.27–£25.47**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Okay****£9.96**
avg listing price — sweet spot $15–$100
**Competition**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-20.2%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£46K**
£46K/yr · 26K searches
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, kilner jars 0.5l is a £46K/yr Amazon United Kingdom market (26K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 37/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **kilner jars 0.5l market data**
- **Units sold / yr**
- **5K–6K**
- avg 250–500/product
- **Revenue / yr**
- **£50K–£60K**
- units × avg price
- **Conversion rate**
- **17.6%**
- **Avg BSR**
- **#151**
- **Page quality**
- **0%**
- **Prime**
- **39%**
- **Sponsored**
- **28%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **44 months**
- **Avg seller age**
- **190 days**
## **Competition & brand share**
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**5 **—flat
**Sellers**
**52**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**0%**
- Kilner90% - Argon Tableware4% - Maison & White3% - ComSaf2% - ZENO1%
## **Demand**
Weekly Amazon search volume, last 47 weeks — -20.2% search growth over the last 90 days.
1K800Holiday '25Spike '26Aug '25Oct '25Dec '25Jan '26Mar '26May '26Jun '26
[**Open Trend **](https://flapen.com/research/uk/home-garden/kilner-jars-0-5l/trend)
## **Top kilner jars 0.5l 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%£5K20%£9K30%£14K40%£18K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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) [2**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) [3**Kilner Round Clip Top Jar 0.5 Litre (500ml) Airtight Glass Storage Jar for Preserving Jams Chutneys Dry Foods Reusable**Kilner**£5.20**4.7★2,641 rev](https://www.amazon.co.uk/dp/B0042FRWL4) [4**Kilner Round Clip Top Jar 0.5 Litre (500ml) Airtight Glass Storage Jar for Preserving Jams Chutneys Dry Foods Reusable**Kilner**£3.87**4.7★547 rev](https://www.amazon.co.uk/dp/B096G865YG) [5**6 x Kilner Square 0.5 Litre Airtight Clip Top Preserve Jars 0025.510**Kilner**£22.00**4.8★790 rev](https://www.amazon.co.uk/dp/B00AE3XV5E)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**ComSaf 3 Pack 500ml Short Glass Jars with Airtight Lids Small Clip Top Jars for Drawers & Pantry Mini Mason Jars for Jam Pickles Canning Snacks Spice Storage & Pantry Organization**ComSaf**£11.23**588 rev3mo ago](https://www.amazon.co.uk/dp/B0GHZ69H2X) [**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) [**ZENO Clip Top Glass Jars 500ml 6PCS | Airtight Glass Storage | Perfect for Dry Food Coffee Beans & Tea Bags | Kitchen Preserving & Spice Containers**ZENO**£12.22**185 rev3y ago](https://www.amazon.co.uk/dp/B0BXFDQX57) [**Kilner Preserve Jar Set of 3 x 0.5L (500ml) Round Glass Screw Top Lid Preservation Storage Jar for Jams Chutneys and Small Pickled Fruits**Kilner**£8.21**336 rev4y ago](https://www.amazon.co.uk/dp/B09QXPN2TL) [**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
[**ComSaf 3 Pack 500ml Short Glass Jars with Airtight Lids Small Clip Top Jars for Drawers & Pantry Mini Mason Jars for Jam Pickles Canning Snacks Spice Storage & Pantry Organization**ComSaf**£11.23**4.7★**▲ 814%**](https://www.amazon.co.uk/dp/B0GHZ69H2X) [**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★**▲ 535%**](https://www.amazon.co.uk/dp/B0030FUHR8) [**Kilner Round Clip Top Jar 0.5 Litre (500ml) Airtight Glass Storage Jar for Preserving Jams Chutneys Dry Foods Reusable**Kilner**£3.87**4.7★**▲ 495%**](https://www.amazon.co.uk/dp/B096G865YG) [**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★**▲ 242%**](https://www.amazon.co.uk/dp/B0C6KWR532) [**Kilner Round Clip Top Jar 0.5 Litre (500ml) Airtight Glass Storage Jar for Preserving Jams Chutneys Dry Foods Reusable**Kilner**£5.20**4.7★**▲ 224%**](https://www.amazon.co.uk/dp/B0042FRWL4)
**~~View all trending →~~**
## **What buyers say about kilner jars 0.5l**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**27%
*“Good quality glass product”*
**Value For Money**16%
*“Good price”*
**Size-Overall**15%
*“Good size for my needs”*
**Advertised Vs Actual Product**11%
*“Exactly what I wanted”*
**Storage Capacity**8%
*“Perfect for storing almost anything you can think of in the kitchen”*
**Ease Of Use**4%
*“easy to use”*
**Durability**4%
*“durable”*
**Thickness**2%
*“slim, versatile, good quality”*
**Ease Of Cleaning**2%
*“Easy to clean”*
**Strength**2%
*“Nice size looks sturdy”*
### **What buyers complain about **
**Durability**19%
*“Breaks Easily”*
**Quality-Overall**16%
*“Not great quality glass”*
**Size-Overall**14%
*“Jars a slightly smaller than I thought”*
**Rusts/Corrodes**7%
*“2 broken, washed the others and the wire fittings dried rusty, don't waste your money”*
**Smell**5%
*“the strong rubber smell doesnt go”*
**Ease Of Use**5%
*“making it completely impossible for a toddler to confidently open or close the jar without the whole thing falling apart”*
**Value For Money**5%
*“The only thing is that I find out the price is too high for what they are”*
**Advertised Vs Actual Product**5%
*“The dimensions provided don't give enough information and are misleading”*
**Leak-Proof**3%
*“leaks if turned upside down”*
**Strength**2%
*“Very fragile, closing mechanism buckles. not robust”*
### **Top return reasons **
**Size-Overall**66%
**Defective Material/Parts**9%
**Advertised Vs Actual Product**4%
**Shape/Style**3%
**Functionality-Overall**2%
**Quality-Overall**2%
**Maintenance And Repair**2%
**Value For Money**2%
**Ease Of Use**1%
**Compatibility-Overall**1%
## **Common questions**
- **Is kilner jars 0.5l profitable to sell on Amazon United Kingdom?**
- The niche generates £46K/yr across 18 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -20.2%. Flapen's verdict: Skip it (37/100).
- **How competitive is the kilner jars 0.5l niche?**
- 5 brands and 52 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in kilner jars 0.5l?**
- Top complaints mined from reviews: Durability, Quality-Overall, Size-Overall. The return rate is 0.6%.
- **What does it cost to enter the kilner jars 0.5l niche?**
- Listings span £2.27–£25.47; the average listing price is £9.96 (sweet spot $15–$100). The average incumbent carries 1,748 reviews — the moat a new listing must climb.
## **Related niches in Home & Garden**
- 79 [**mole repellent**](https://flapen.com/research/uk/home-garden/mole-repellent)£163K/yr+91.4%**Worth a look**- 80 [**sun lounger**](https://flapen.com/research/uk/home-garden/sun-lounger)£2.5M/yr+299.9%**Launch it**- 80 [**fly repellent fan**](https://flapen.com/research/uk/home-garden/fly-repellent-fan)£302K/yr>1,000%**Worth a look**- 80 [**ice maker**](https://flapen.com/research/uk/home-garden/ice-maker)£2.9M/yr+371.4%**Launch it**- 80 [**parasol base**](https://flapen.com/research/uk/home-garden/parasol-base)£1.1M/yr+904.4%**Launch it**- 80 [**air conditioner**](https://flapen.com/research/uk/home-garden/air-conditioner)£39.3M/yr>1,000%**Launch it**[**All Home & Garden niches **](https://flapen.com/research/uk/home-garden)