Is retainer case profitable to sell on Amazon United States?

The niche generates $1.5M/yr across 36 tracked products. 7 of 12 products launched in the last 360 days are still selling. 90-day search growth is -0.6%. Flapen's verdict: Worth a look (59/100).

How competitive is the retainer case niche?

18 brands and 23 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 68% of demand.

What do buyers complain about in retainer case?

Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 1.1%.

When does demand for retainer case peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the retainer case niche?

Listings span $4.24–$24.82; the average listing price is $8.77 (sweet spot $15–$100). The average incumbent carries 1,481 reviews — the moat a new listing must climb.

retainer case

Worth a look

Shows low returns (1.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Great1.1%

return rate — above 5% kills the launch gate

Market size

Great$1.5M

$1.5M/yr · 2.1M searches

Conversion

Great7.9%

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

Competition

Good44%

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

Brand share

Good68%

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

Review moat

Good1,481.22

avg incumbent reviews — the moat a new listing must climb

Price range

Okay$4.24–$24.82

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

Growth

Bad-0.6%

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

Avg price

Bad$8.77

avg listing price — sweet spot $15–$100

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

According to Flapen's Amazon United States niche tracking, retainer case is a $1.5M/yr Amazon United States market (2.1M searches/yr). The top 5 brands hold 68% of demand. Verdict: Worth a look — 59/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

retainer case market data

Units sold / yr: 150K–200K; avg 4,000–5,000/product
Revenue / yr: $1.3M–$1.8M; units × avg price
Conversion rate: 7.9%
Avg BSR: #39
Page quality: 0%
Prime: 100%
Sponsored: 86%
Out of stock: 3.5%
Avg brand age: 41 months
Avg seller age: 148 days

Competition & brand share

The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.

Brands

18 falling

Sellers

Top-5 brand share

68%

Top 20: 100%

Top-5 click share

44%

Top 20: 81%

Open market

27%

INVISALIGN25%
Gaboolo14%
HEMILAB13%
JMU10%
Practicon5%
Hoewina5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -0.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top retainer case search terms

retainer case1.1M/yr -1.5%6.7% conv.
invisalign case604K/yr -1.0%7.3% conv.
aligner case44K/yr -0.3%4.0% conv.
night guard case38K/yr -1.3%4.1% conv.
retainer cases39K/yr -0.3%5.4% conv.
retainer holder47K/yr -15.1%4.8% conv.
retainer case with vent holes24K/yr +65.3%5.2% conv.
retainer container23K/yr +16.8%6.1% conv.
retainer case invisalign32K/yr -16.4%7.6% conv.
cute retainer case20K/yr +1.3%1.0% conv.

All search terms

Top retainer case 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

INVISALIGN Aligner and Retainer Case Black

INVISALIGN$12.524.8★6,643 rev

INVISALIGN Aligner and Retainer Case Pink

INVISALIGN$12.374.8★6,643 rev

2 Pack Retainer Case Compatible with Invisalign Slim Aligner Case with Removal Tool Aligner Seaters & Brush Pocket Size Secure Magnetic Closure for Travel - Black

HEMILAB$8.574.7★1,307 rev

JMU Retainer Case with Vent Holes Mouth Guard Case Dental Storage Container (Purple)

JMU$4.264.7★1,201 rev

Gaboolo Retainer Case Slim Aligner Case with Vent Holes Removable Inner Tray Silicone for Easy Cleaning (1Pack Pink Purple)

Gaboolo$7.864.6★309 rev

Newest

by launch date

Retainer Case with Vent Holes Aligner Case Kit for Invisalign

HEMILAB$7.84687 rev

5mo ago

Retainer Case with Vent Holes Aligner Case Kit for Invisalign

HEMILAB$7.72687 rev

6mo ago

2 Pack Retainer Case Magnetic Aligner Case Compatible with Invisalign Portable Slim Orthodontic Storage Kit for Clear Aligners - Pink

VCAREU$7.92111 rev

7mo ago

Gaboolo 2 Pack Retainer Case Ultra-slim Aligner Case with Vent Holes Removable Inner Tray Silicone for Easy Cleaning (2Pack Yellow Green)

Gaboolo$8.99120 rev

7mo ago

Gaboolo Retainer Case Slim Aligner Case with Vent Holes Removable Inner Tray Silicone for Easy Cleaning (1Pack Pink Purple)

Gaboolo$7.86309 rev

11mo ago

What buyers say about retainer case

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

What buyers love

Quality-Overall14%

“The quality was solid”

Size-Overall14%

“with good fit while in case”

Advertised Vs Actual Product10%

“As advertised”

Color8%

“the color is very accurate”

Ease Of Use8%

“Easy to use”

Value For Money7%

“Amazing value”

Ease Of Cleaning6%

“Easy to clean”

Storage Capacity4%

“storage”

Durability4%

“durable I've had the case fall so many time”

Design-Overall4%

“Very well constructed”

What buyers complain about

Size-Overall22%

“with the limited fit”

Durability12%

“Breaks easily”

Quality-Overall7%

“Cheap made”

Smell4%

“which leads to that unpleasant smell”

Leak-Proof4%

“This item leaks”

Advertised Vs Actual Product3%

“False advertising”

Ease Of Use3%

“Sometimes hard to twist off”

Thickness2%

“It is not deep enough”

Material Quality2%

“Dont buy this cheap plastic case”

Value For Money2%

“I think the value for money is a bit expensive though”

Top return reasons

Size-Overall56%

Advertised Vs Actual Product8%

Color6%

Gap/Hole4%

Defective Material/Parts3%

Product Condition2%

Ease Of Use2%

Quality-Overall2%

Functionality-Overall2%