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38

glitter sublimation tumblers 20 oz skinny straight

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A small market ($12K/yr) — this niche doesn't clear our bar today.

Market size 3Growth 14Conversion 26Competition 37Returns 90Price range 76Avg price 95Brand share 37Review moat 79Quality gap 21

Avg price

Incredible$40.34

avg listing price — sweet spot $15–$100

Returns

Great1.2%

return rate — above 6% kills the launch gate

Review moat

Great411.95

avg incumbent reviews — the moat a new listing must climb

Price range

Great$11.83–$123.95

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

Competition

Okay63%

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

Brand share

Okay83%

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

Conversion

Okay2.1%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-22.4%

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

Market size

Bad$12K

$12K/yr · 15K searches

Competition

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 flat

Sellers

14

Top-5 brand share

83%

Open market

13%

  • Wzaytia39%
  • PYD Life20%
  • AGH10%
  • ColorSub9%
  • Hogg5%
  • Temolulu5%
  • Open — no brand owns it (6 brands, 13%)

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$1K20%$2K30%$4K40%$5K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 19 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 101 weeks — -22.4% search growth over the last 90 days.
900700Prime Day '24Spike '24Holiday '24Prime Day '25Spike '25Spike '26DecMarJunAugNovMarMay

Peak months: Nov, Dec · busiest ÷ quietest = 2.5×

Reviews

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

What buyers love

Quality-Overall24%

“The quality is beautiful in the size of a cup is a 20 ounce cup”

Brightness/Shine/Glow16%

“my daughter said it glows so bright at night”

Color13%

“Bright colors”

Value For Money9%

“Price was great for the 4pk”

Print Quality7%

“The prints come out amazing”

Material Quality6%

“The material was great”

Gifting Purpose3%

“Great for selling or gifting”

Non-Stick Coating3%

“the white coating is great”

Leak-Proof3%

“Leak proof”

Measurement/Reading Accuracy3%

“at least its closer to accurate”

What buyers complain about

Color25%

“I just wish I could order all of one color”

Size-Overall17%

“A little small”

Brightness/Shine/Glow13%

“Does not glow in the dark”

Temperature Retention8%

“These cups arent for hot drinks”

Strength8%

“Not very sturdyas Boxes were damaged”

Temperature Control8%

“Does not keep drinks cold as stated”

Bulb Flicker/Dimming/Color4%

“They dont glow in the dark”

Value For Money4%

“Too expensive”

Advertised Vs Actual Product3%

“please ignore the reviews from people who clearly did not read the product description before buying”

Top return reasons

Value For Money20%
Size-Overall19%
Advertised Vs Actual Product14%
Leak-Proof13%
Quality-Overall8%
Heating6%
Brightness/Shine/Glow5%
Color3%
Touch/Button Controls3%
Compatibility-Overall3%