fermentation jars
Worth a lookShows low returns (0.4%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Avg price
Great£17.55avg listing price — sweet spot $15–$100
Competition
Great39%top-5 click share — an open shelf
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Review moat
Good750.89avg incumbent reviews — the moat a new listing must climb
Price range
Good£3.45–£38.07cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good70%top-5 brand share — brands hold most of the demand
Conversion
Good4.3%search→purchase rate — share of searches ending in a sale
Market size
Okay£152K£152K/yr · 200K searches
Growth
Bad-20.6%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, fermentation jars is a £152K/yr Amazon United Kingdom market (200K searches/yr). The top 5 brands hold 70% of demand. Demand peaks in Jan–Dec. Verdict: Worth a look — 58/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
fermentation jars market data
- Units sold / yr
- 6K–8K
- avg 100–250/product
- Revenue / yr
- £105K–£140K
- units × avg price
- Conversion rate
- 4.3%
- Avg BSR
- #187
- Page quality
- 0%
- Prime
- 76%
- Sponsored
- 82%
- Out of stock
- 9.9%
- Avg brand age
- 36 months
- Avg seller age
- 183 days
Competition & brand share
Clicks spread well past the top 5 (39% combined) — an open shelf where new products get seen.Brands
24 rising
Sellers
68
Top-5 brand share
70%
Top 20: 98%
Top-5 click share
39%
Top 20: 82%
Open market
25%
- HEFTMAN19%
- volila17%
- Kilner17%
- SwiftSlot11%
- YUEYEE6%
- lakeland5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -20.6% search growth over the last 90 days.Peak months: Jan, Dec · busiest ÷ quietest = 1.9×
Top fermentation jars search terms
- fermentation jars88K/yr
- fermenting jar20K/yr
- fermentation jar16K/yr
- kimchi jar14K/yr
- fermentation kit13K/yr
- fermenting jars10K/yr
- sauerkraut fermentation jar9K/yr
- fermentation jars with weights6K/yr
- fermenting jars with weights6K/yr
- kilner fermentation jar5K/yr
Top fermentation 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Kilner 3 Litre Fermentation Set Airtight Glass Jar with Silicone Lid Air Lock Ceramic Weights & Recipe Booklet Ideal for Sauerkraut Kimchi & Pickles
Kilner£20.214.4★1,833 rev
volila Fermentation Jars 1.4 Litre 2 Pack Fermenting Jar with Airlock 1 Way Air Release Vent Ideal for Kimchi Jar Sourdough Jar and Sauerkraut Fermentation Jars
volila£11.194.3★468 rev
volila Fermentation Jars 2.2 Litre 2 Pack Fermenting Jar with Airlock 1 Way Air Release Vent Ideal for Kimchi Jar Sourdough Jar and Sauerkraut Fermentation Jars
volila£11.914.3★468 rev
Fermentation Jars 2 Pack 2L Kimchi Container Fermenting Jar with Airlock Perfect for Fermentation Kimchi Sauerkraut Sourdough Starter Kefir Glass Jars with Lids
YUEYEE£16.144.5★38 rev
SwiftSlot 1.5L Fermentation Jars with Weights & Air Lock Fermenting Kit for Sauerkraut Kimchi Kombucha and Pickles 2 Pack
SwiftSlot£25.904.4★108 rev
Newest
by launch date
PIuertoRick Fermenting Jar 2 Pack with Airlock - 2L for Safe Fermentation for Kefir Kimchi Sauerkraut Sourdough Starter - Silicone Lids & Fermentation Weights - Fermentation Jars 2 Pack (Full Set)
PIuertoRick£20.882 rev
YBCPACK 2 Pack 2L Glass Fermentation Jars with Weight & Airlocks-Wide Mouth
YBCPACK£20.029 rev
AULEEP 2L Fermentation Jars with Fermentation Weights & Fermenting Airlock 2-Set Fermenting Kit for Ssauerkraut kimchi kombucha fruits vegetables pickled vegetables sourdough starter etc.
AULEEP£22.6220 rev
Hejo 2L Fermentation Jar with Airlock and Screw Lids Fermentation Bucket with Adjustable Time Scale Kimchi Container Mead Making Kit Fermenting Kit for Kimchi Sauerkraut Kombucha Pickles
Hejo£13.206 rev
Fermentation Jars 2 Pack 2L Kimchi Container Fermenting Jar with Airlock Perfect for Fermentation Kimchi Sauerkraut Sourdough Starter Kefir Glass Jars with Lids
YUEYEE£16.1438 rev
Trending
90-day click momentumYBCPACK 2 Pack 2L Glass Fermentation Jars with Weight & Airlocks-Wide Mouth
YBCPACK£20.024.1★
PIuertoRick Fermenting Jar 2 Pack with Airlock - 2L for Safe Fermentation for Kefir Kimchi Sauerkraut Sourdough Starter - Silicone Lids & Fermentation Weights - Fermentation Jars 2 Pack (Full Set)
PIuertoRick£20.884.5★
volila Fermentation Jars 2.2 Litre 2 Pack Fermenting Jar with Airlock 1 Way Air Release Vent Ideal for Kimchi Jar Sourdough Jar and Sauerkraut Fermentation Jars
volila£11.914.3★
Fermentation Jars 2 Pack 2L Kimchi Container Fermenting Jar with Airlock Perfect for Fermentation Kimchi Sauerkraut Sourdough Starter Kefir Glass Jars with Lids
YUEYEE£16.144.5★
AULEEP 2L Fermentation Jars with Fermentation Weights & Fermenting Airlock 2-Set Fermenting Kit for Ssauerkraut kimchi kombucha fruits vegetables pickled vegetables sourdough starter etc.
AULEEP£22.624.1★
What buyers say about fermentation jars
What buyers praise and complain about, mined from review topics.What buyers love
“Quality jar”
“Good quality nice size”
“Good value”
“Does the job”
“Large capacity”
“Ease of use”
“Strong and sturdy”
“He thinks this kimchi is delicious”
“with thick”
“clean them properly afterwards”
What buyers complain about
“Wish jar was larger”
“Breaks Easily”
“its not reliable at all”
“is a slightly thicker glass”
“Flimsy inner seal”
“struggled to open it”
“they cant be bothered to tell you how to use”
“Disappointing for the price”
“came off when cleaning”
“slimy, not crunchy”
Top return reasons
Common questions
- Is fermentation jars profitable to sell on Amazon United Kingdom?
- The niche generates £152K/yr across 45 tracked products. 2 of 14 products launched in the last 360 days are still selling. 90-day search growth is -20.6%. Flapen's verdict: Worth a look (58/100).
- How competitive is the fermentation jars niche?
- 24 brands and 68 sellers compete. The top 5 products take 39% of clicks and top 5 brands hold 70% of demand.
- What do buyers complain about in fermentation jars?
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 0.4%.
- When does demand for fermentation jars peak?
- Demand peaks in Jan–Dec; the busiest month runs 1.9× the quietest.
- What does it cost to enter the fermentation jars niche?
- Listings span £3.45–£38.07; the average listing price is £17.55 (sweet spot $15–$100). The average incumbent carries 751 reviews — the moat a new listing must climb.