kilner jars
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Conversion
Great8.6%search→purchase rate — share of searches ending in a sale
Market size
Good£426K£426K/yr · 576K searches
Review moat
Okay2,380.69avg incumbent reviews — the moat a new listing must climb
Price range
Okay£2.27–£22.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Avg price
Bad£8.66avg listing price — sweet spot $15–$100
Competition
Bad77%top-5 click share — a locked-up shelf
Growth
Bad-15.0%90-day search growth — must beat 0% to launch
Brand share
Bad100%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
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.No pronounced peak months · busiest ÷ quietest = 1.6×
Top kilner jars search terms
- 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
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.
All 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Kilner Clip Top Jar 1 Litre (1000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta
Kilner£3.454.7★5,001 rev
Kilner Clip Top Jar 2 Litre (2000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta
Kilner£5.004.7★5,686 rev
Kilner Preserve Jar 0.5L (500ml) Round Glass Screw Top Lid Preservation Storage Jar for Jams Chutneys Small Pickled Fruits
Kilner£2.274.6★3,565 rev
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£10.414.7★816 rev
Kilner Preserve Jar 1L (1000ml) Round Glass Screw Top Lid Preservation Storage Jar for Pickling Vegetables Whole Fruits Chunky Chutneys
Kilner£2.884.6★2,474 rev
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£17.18159 rev
Kilner Square Clip Top Jar 250ml (0.25L) Airtight Glass Jar for Storing Herbs Spices Dried Fruits Nuts and Seeds
Kilner£4.5477 rev
Kilner Square Clip Top Jar 3L (3000ml) Airtight Glass Jar for Preserving Whole Fruits Vegetables and Storing Cereals Pasta Nests Pet Biscuits
Kilner£10.70160 rev
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£12.80510 rev
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£10.41816 rev
Trending
90-day click momentumKilner Square Clip Top Jar 250ml (0.25L) Airtight Glass Jar for Storing Herbs Spices Dried Fruits Nuts and Seeds
Kilner£4.544.4★
Kilner Clip Top Jar 2 Litre (2000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta
Kilner£5.004.7★
Kilner Square Clip Top Jar 3L (3000ml) Airtight Glass Jar for Preserving Whole Fruits Vegetables and Storing Cereals Pasta Nests Pet Biscuits
Kilner£10.704.5★
Kilner Preserve Jar 1L (1000ml) Round Glass Screw Top Lid Preservation Storage Jar for Pickling Vegetables Whole Fruits Chunky Chutneys
Kilner£2.884.6★
Kilner Clip Top Jar 1 Litre (1000ml) Airtight Glass Storage Jar for Preserving Fruits Vegetables Coffee Tea Rice Flour Nuts Pasta
Kilner£3.454.7★
What buyers say about kilner jars
What buyers praise and complain about, mined from review topics.What buyers love
“Great producT”
“Great value”
“Excellent jars in all sizes”
“great storage capacity”
“Does the job”
“It's sturdy as well”
“easy to use”
“Doesnt leak,”
“durable”
“Easy to clean”
What buyers complain about
“Not great quality glass”
“Breaks Easily”
“Not fit for purpose”
“Lid rusts”
“Misleading”
“very stiff to open and close, take it will get easier with time”
“Do not keep smells in the jar the best”
“not leak proof”
“lids very fragile one fell apart while using”
“I dont like the lid be nice if it was a different design”
Top return reasons
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.