Is zero waste cap profitable to sell on Amazon United States?

The niche generates $264K/yr across 10 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is -56.3%. Flapen's verdict: Skip it (38/100).

How competitive is the zero waste cap niche?

5 brands and 8 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in zero waste cap?

Top complaints mined from reviews: Size-Overall, Leak-Proof, Functionality-Overall. The return rate is 2.0%.

When does demand for zero waste cap peak?

Demand peaks in Feb–Apr–Dec; the busiest month runs 2.4× the quietest.

What does it cost to enter the zero waste cap niche?

Listings span $9.95–$34.71; the average listing price is $16.26 (sweet spot $15–$100). The average incumbent carries 5,868 reviews — the moat a new listing must climb.

zero waste cap

Skip it

Soft demand (-56.3% this quarter) — this niche doesn't clear our bar today.

Price range

Great$9.95–$34.71

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

Avg price

Great$16.26

avg listing price — sweet spot $15–$100

Returns

Good2.0%

return rate — above 5% kills the launch gate

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Conversion

Good4.6%

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

Market size

Okay$264K

$264K/yr · 354K searches

Review moat

Bad5,868.2

avg incumbent reviews — the moat a new listing must climb

Competition

Bad82%

top-5 click share — a locked-up shelf

Growth

Bad-56.3%

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 States niche tracking, zero waste cap is a $264K/yr Amazon United States market (354K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Feb–Apr–Dec. Verdict: Skip it — 38/100.

Data updated Jul 6, 2026 · scored weekly · How we score niches

zero waste cap market data

Units sold / yr: 15K–20K; avg 1,250–1,500/product
Revenue / yr: $244K–$325K; units × avg price
Conversion rate: 4.6%
Avg BSR: #120
Page quality: 0%
Prime: 100%
Sponsored: 90%
Out of stock: 5.5%
Avg brand age: 43 months
Avg seller age: 169 days

Competition & brand share

The top 5 products capture 82% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 falling

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

82%

Top 20: 100%

Open market

Flip-It!69%
WhiteRhino17%
Luvan6%
G GAMERIEND4%
Generic4%

Demand & seasonality

Weekly Amazon search volume, last 109 weeks — -56.3% search growth over the last 90 days.

Peak months: Feb, Apr, Dec · busiest ÷ quietest = 2.4×

Open Trend

Top zero waste cap search terms

bottle emptying cap69K/yr -38.4%4.7% conv.
flip it bottle emptying kit54K/yr -53.3%8.3% conv.
bottle emptying kit32K/yr -45.8%3.5% conv.
bottle emptying caps17K/yr -50.6%3.9% conv.
flip it bottle emptying cap23K/yr -51.1%6.4% conv.
flip it20K/yr -36.0%3.9% conv.
upside down bottle holder11K/yr -5.8%2.5% conv.
bottle lids10K/yr -4.3%0.2% conv.
upside down bottle dispenser cap13K/yr -60.6%5.6% conv.
lotion bottle caps to get the last drop10K/yr -41.3%7.0% conv.

All search terms

Top zero waste cap 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 10 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Flip-It! Bottle Emptying Kit 6 Bottle Pack - No more wasted product - Fits most plastic bottles 6 Base Caps 6 Adapters Pastel Color Edition

Flip-It!$19.744.5★18,377 rev

Flip-It! 2-Pack Premium Bottle Emptying Kit No more wasted product - Fits most plastic bottles Get out every drop of Shampoos Lotions & More 2 Base Caps 6 Adapters Pastel Color Edition

Flip-It!$15.864.5★18,377 rev

WhiteRhino Bottle Emptying Cap with 3 Size Flip Bottle Emptying Kit|Upside Down Bottle Dispenser Cap|Squeeze Fit Most -for Pump Bottle Lotion Shampoo Body Wash Get Last Drop2cs

WhiteRhino$11.754.4★109 rev

Flip-It! Bottle Emptying Kit 6 Bottle Pack - No more wasted product - Fits most plastic bottles 6 Base Caps 6 Adapters Bright Color Edition

Flip-It!$19.794.5★18,377 rev

Luvan 2-Pack Bottle Emptying Cap Flip Dispenser Kit for Every Drop Universal Inverted No-Waste Caps for Shampoo Lotion Soap Ketchup Mustard Sauces Space-Saver for Kitchen Bathroom

Luvan$11.754.2★50 rev

Newest

by launch date

WhiteRhino Bottle Emptying Cap with 3 Size Flip Bottle Emptying Kit|Upside Down Bottle Dispenser Cap|Squeeze Fit Most -for Pump Bottle Lotion Shampoo Body Wash Get Last Drop2cs

WhiteRhino$11.75109 rev

4mo ago

Luvan 2-Pack Bottle Emptying Cap Flip Dispenser Kit for Every Drop Universal Inverted No-Waste Caps for Shampoo Lotion Soap Ketchup Mustard Sauces Space-Saver for Kitchen Bathroom

Luvan$11.7550 rev

4mo ago

WhiteRhino Bottle Emptying Cap Kit 2 Upside Down Bottle Stands with 4 Caps 2 x 24mm & 2 x 28mm Bottle Emptying Kit to Flip Bottles for Shampoo Lotion Body Wash and Condiments

WhiteRhino$10.80160 rev

8mo ago

WhiteRhino Bottle Emptying Cap Kit 4 Pack Bottle Emptying Kit with Stands 2 x 24mm & 2 x 28mm Upside Down Flip Caps for Shampoo Lotion Conditioner Body Wash Honey and Condiments

WhiteRhino$15.35160 rev

9mo ago

Generic 10-Pack Bottle Emptying Cap Kit with 5 Sizes - Reusable Leak-Proof Flip Top Snap Top Dispenser Cap Fit Most Bottles - Easy Zero Waste Money Saver Perfect Home & Bathroom Accessories

Generic$9.95102 rev

2y ago

What buyers say about zero waste cap

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

What buyers love

Ease Of Use16%

“Very handy”

Advertised Vs Actual Product12%

“As Advertised”

Quality-Overall11%

“This is such clever product”

Efficiency11%

“well served its purpose”

Size-Overall11%

“Fit well”

Value For Money8%

“Great buy”

Leak-Proof4%

“do not leak”

Dispensing Mechanism4%

“Such an easy way to maximize usage of your various products that dispense with a pump”

Design-Overall3%

“Seriously the coolest modern invention”

Assembly/Installation2%

“Easy assembly”

What buyers complain about

Size-Overall31%

“Doesnt fit”

Leak-Proof10%

“they leak”

Functionality-Overall7%

“These bottle-emptying caps DID NOT work at all”

Ease Of Use7%

“Difficult to use”

Value For Money6%

“not that great for the price”

Quality-Overall4%

“Piece of CRAP”

Natural Resource Wastage3%

“Waste of money”

Dispensing Mechanism3%

“can't get it dispensed with this kit on the bottle”

Compatibility-Overall3%

“an adapter that cannot be used on its own is out of control”

Ease Of Cleaning2%

“This is messy and time consuming,”

Top return reasons

Size-Overall54%

Functionality-Overall9%

Advertised Vs Actual Product7%

Compatibility-Overall6%

Leak-Proof5%

Defective Material/Parts5%

Value For Money3%

Ease Of Use2%

Product Condition2%

Dispensing Mechanism1%

Common questions

Is zero waste cap profitable to sell on Amazon United States?: The niche generates $264K/yr across 10 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is -56.3%. Flapen's verdict: Skip it (38/100).
How competitive is the zero waste cap niche?: 5 brands and 8 sellers compete. The top 5 products take 82% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in zero waste cap?: Top complaints mined from reviews: Size-Overall, Leak-Proof, Functionality-Overall. The return rate is 2.0%.
When does demand for zero waste cap peak?: Demand peaks in Feb–Apr–Dec; the busiest month runs 2.4× the quietest.
What does it cost to enter the zero waste cap niche?: Listings span $9.95–$34.71; the average listing price is $16.26 (sweet spot $15–$100). The average incumbent carries 5,868 reviews — the moat a new listing must climb.