Skip to content
52

donut filler

Worth a look

Shows beatable incumbent ratings (4.3★), but prices mostly outside the sweet spot ($5.50–$2031.61) keeps it on the watch list.

Market size 49Growth 7Conversion 68Competition 47Returns 72Price range 4Avg price 74Brand share 69Review moat 77Quality gap 78

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Review moat

Great450.71

avg incumbent reviews — the moat a new listing must climb

Avg price

Good$102.28

avg listing price — sweet spot $15–$100

Returns

Good2.1%

return rate — above 5% kills the launch gate

Brand share

Good63%

top-5 brand share — brands hold most of the demand

Conversion

Good6.1%

search→purchase rate — share of searches ending in a sale

Market size

Okay$267K

$267K/yr · 43K searches

Competition

Okay57%

top-5 click share — leaders hold, buyers still browse

Growth

Bad-35.3%

90-day search growth — must beat 0% to launch

Price range

Bad$5.50–$2031.61

cheapest to priciest tracked listing — scored on the share inside $15–$100

According to Flapen's Amazon United States niche tracking, donut filler is a $267K/yr Amazon United States market (43K searches/yr). The top 5 brands hold 63% of demand. Demand peaks in Feb–Dec. Verdict: Worth a look — 52/100.

Data updated Aug 4, 2026 · scored weekly · How we score niches

donut filler market data

Units sold / yr
2K–3K
avg 0–100/product
Revenue / yr
$205K–$256K
units × avg price
Conversion rate
6.1%
Avg BSR
#13,086
Page quality
0%
Prime
86%
Sponsored
86%
Out of stock
4.8%
Avg brand age
35 months
Avg seller age
194 days

Competition & brand share

The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.

Brands

23 falling

Sellers

38

Top-5 brand share

63%

Top 20: 98%

Top-5 click share

57%

Top 20: 94%

Open market

31%

  • The Kosher Cook20%
  • AOSHIDINGSHUO14%
  • ELEGICKLIP12%
  • Norpro11%
  • Edhard Corporation7%
  • KFHENSOMR6%

Demand & seasonality

Weekly Amazon search volume, last 75 weeks — -35.3% search growth over the last 90 days.
2K1KPrime Day '25Spike '25Holiday '25Spike '26MarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul

Peak months: Feb, Dec · busiest ÷ quietest = 3.2×

Top donut filler search terms

  • donut filler injector12K/yr
  • donut filler8K/yr
  • pastry filling injector4K/yr
  • donut filling injector5K/yr
  • donut injector4K/yr
  • pastry filler4K/yr
  • pastry filler injector3K/yr
  • filling injector baking3K/yr
All search terms

Top donut filler 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%4%$11K8%$21K12%$32K16%$43K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)3 products missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

What buyers say about donut filler

What buyers praise and complain about, mined from review topics.

What buyers love

Ease Of Use23%

“Easy to use”

Ease Of Cleaning12%

“The stainless steel body cleans up fast”

Value For Money11%

“great value”

Advertised Vs Actual Product10%

“Just what I needed”

Quality-Overall9%

“The piping tips are fine”

Baking7%

“Buy several, you can use them for icing on a cake, cookie decoration or egg decor i've seen so many multi purpose things for me in the kitchen and when i'm baking or cooking with others, everyone has their own”

Efficiency3%

“Works great”

Thickness2%

“peanut butter is thicker than cookie dough”

Material Quality2%

“Quality of stainless steel is really good which is why I'm leaving 3 stars”

Functionality-Overall2%

“Perfect to inject pasteries”

What buyers complain about

Functionality-Overall17%

“Doesnt work”

Quality-Overall15%

“It felt very cheap”

Durability14%

“I doubt it will last”

Size-Overall6%

“Tips are too long”

Ease Of Use5%

“Not usable”

Strength4%

“Weak”

Value For Money4%

“Not worth it”

Thickness4%

“Not wide enough for injecting thicker fillings like icing or preserves”

Leak-Proof4%

“It would not seal well enough to suck water into tube”

Ease Of Cleaning4%

“cleaning I don't find convenient”

Top return reasons

Size-Overall28%
Functionality-Overall14%
Quality-Overall10%
Advertised Vs Actual Product8%
Ease Of Use7%
Product Condition5%
Material Quality4%
Durability3%
Leak-Proof3%
Strength3%

Common questions

Is donut filler profitable to sell on Amazon United States?
The niche generates $267K/yr across 28 tracked products. 0 of 11 products launched in the last 360 days are still selling. 90-day search growth is -35.3%. Flapen's verdict: Worth a look (52/100).
How competitive is the donut filler niche?
23 brands and 38 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 63% of demand.
What do buyers complain about in donut filler?
Top complaints mined from reviews: Functionality-Overall, Quality-Overall, Durability. The return rate is 2.1%.
When does demand for donut filler peak?
Demand peaks in Feb–Dec; the busiest month runs 3.2× the quietest.
What does it cost to enter the donut filler niche?
Listings span $5.50–$2031.61; the average listing price is $102.28 (sweet spot $15–$100). The average incumbent carries 451 reviews — the moat a new listing must climb.