Mermaid Cup
Worth a lookShows no brand lock-in (top 5 brands take 34% of clicks), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Brand share
Incredible34%top-5 brand share — no brand owns this niche
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Competition
Great21%top-5 click share — an open shelf
Avg price
Great$18.44avg listing price — sweet spot $15–$100
Growth
Good+57.8%90-day search growth — must beat 0% to launch
Price range
Good$4.94–$40.05cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Okay3.1%search→purchase rate — share of searches ending in a sale
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Review moat
Okay2,953.68avg incumbent reviews — the moat a new listing must climb
Market size
Bad$64K$64K/yr · 111K searches
Is mermaid cup profitable on Amazon?
According to Flapen's Amazon United States niche tracking, mermaid cup is a $64K/yr Amazon United States market (111K searches/yr). The top 5 brands hold 34% of demand. Demand peaks in Jul–Aug. Verdict: Worth a look — 64/100.
Data updated Jul 26, 2026 · scored weekly · How we score niches
mermaid cup market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 3K–4K
- avg 0–100/product
- Revenue / yr
- $55K–$74K
- units × avg price
- Conversion rate
- 3.1%
- Avg BSR
- #1,055
- Page quality
- 0%
- Prime
- 98%
- Sponsored
- 86%
- Out of stock
- 7.3%
- Avg brand age
- 32 months
- Avg seller age
- 162 days
Competition: brands, sellers & click share
Clicks spread well past the top 5 (21% combined) — an open shelf where new products get seen.Brands
68 rising
Sellers
121
Top-5 brand share
34%
Top 20: 71%
Top-5 click share
21%
Top 20: 58%
Open market
63%
- SANDJEST11%
- Simple Modern8%
- Zak Designs5%
- Home Tune5%
- EDSPORTSHOUSE4%
- Ntswasd4%
mermaid cup demand & seasonality
Weekly Amazon search volume, last 104 weeks — +57.8% search growth over the last 90 days.Peak months: Jul, Aug · busiest ÷ quietest = 2.3×
Top mermaid cup search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- mermaid cups29K/yr
- mermaid water bottle31K/yr
- mermaid cup17K/yr
- little mermaid water bottle10K/yr
- mermaid water bottle for girls16K/yr
- mermaid party cups5K/yr
- mermaid cups for party3K/yr
Top mermaid cup products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.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
Simple Modern Disney Princess Ariel Kids Water Bottle with Straw Lid | 14oz Insulated Stainless Steel Kids Tumbler & Spill Proof Toddler Cup for School Girls Boys | Summit | Ariels Day Dream
Simple Modern$21.774.6★8,369 rev
SANDJEST Mermaid Kids Water Bottle With Straw Lid 12oz Insulated Stainless Steel Travel Tumbler Gifts For Girls Birthday Christmas Back To School
SANDJEST$17.874.4★593 rev
EDsportshouse Decorate Your Own Water Bottle Kits for Girls Age 4-6-8-10 Mermaid Painting Crafts Fun Arts and Crafts Gifts Toys for Girls Birthday Christmas(Mermaid)
EDSPORTSHOUSE$17.034.6★5,035 rev
SANDJEST Mermaid Water Bottle - Kids Water Bottle with Straw Lid - 12 Oz Insulated Stainless Steel Water Bottles for Kid Girl - Travel Cup for School Sports
SANDJEST$17.234.4★593 rev
Simple Modern Disney The Little Mermaid Ariel Kids Water Bottle with Straw Lid | 18oz Insulated Stainless Steel Kids Tumbler & Spill Proof Toddler Cup for School Girls Boys | Summit | Ariels Dream
Simple Modern$24.014.6★8,369 rev
Newest
by launch date
Mermaid Kids Insulated Stainless Steel Water Bottle 16 Oz Travel Tumbler for School Sports for Girls Birthday Back To School
SANDJEST$20.4941 rev
FYSUIMU 50 Pcs Summer Mermaid Plastic Cups 16oz Clear Drinking Cups Under The Sea Mermaid Tail Disposable Cup for Ocean Birthday Party Table Decor Supplies
FYSUIMU$19.934 rev
Mommore Kids Insulated Water Bottle with Soft Rubber Handle 12oz Stainless Steel Thermos with Straw Lid Leak Proof Easy to Clean Design Vacuum Small Canteen for School Boys Girls Mermaid-1 Pc
mommore$12.32111 rev
Honeydak 12 Sets Mermaid Party Cups with Lid and Straw 24oz Mermaid Birthday Favors Tail Shell Pastel Reusable Cups Bulk and Greeting Card Appreciation Gift for Baby Shower Ocean Party Supplies
Honeydak$23.8012 rev
24 Mermaid Party Favors Cups with Lids and Mermaid Tail Straws Decorations
FZR Legend$26.769 rev
Trending
90-day click momentumMermaid Kids Insulated Stainless Steel Water Bottle 16 Oz Travel Tumbler for School Sports for Girls Birthday Back To School
SANDJEST$20.494.5★
Honeydak 12 Sets Mermaid Party Cups with Lid and Straw 24oz Mermaid Birthday Favors Tail Shell Pastel Reusable Cups Bulk and Greeting Card Appreciation Gift for Baby Shower Ocean Party Supplies
Honeydak$23.804.6★
FYSUIMU 50 Pcs Summer Mermaid Plastic Cups 16oz Clear Drinking Cups Under The Sea Mermaid Tail Disposable Cup for Ocean Birthday Party Table Decor Supplies
FYSUIMU$19.935.0★
24 Mermaid Party Favors Cups with Lids and Mermaid Tail Straws Decorations
FZR Legend$26.764.0★
Mommore Kids Insulated Water Bottle with Soft Rubber Handle 12oz Stainless Steel Thermos with Straw Lid Leak Proof Easy to Clean Design Vacuum Small Canteen for School Boys Girls Mermaid-1 Pc
mommore$12.324.6★
What reviews say buyers love and hate about mermaid cup
What buyers praise and complain about, mined from review topics.What buyers love
“The colors are also really beautiful”
“Good Quality”
“Worth It”
“Perfect size”
“Nice and sturdy”
“Durable and Cute”
“completely leak-proof”
“As shown”
“Christmas present”
“Love the black and white design”
What buyers complain about
“leaks like crazy”
“It will break easily”
“The cups were smaller than I expected”
“Fragile”
“they look cheap”
“However, cleaning this thing is a total nightmare”
“Total waste of money”
“But the plates are thin”
“The cups made whatever I poured in them taste funny”
“Dents very easily”
Top return reasons
Common mermaid cup questions
- Is mermaid cup profitable to sell on Amazon United States?
- The niche generates $64K/yr across 97 tracked products. 3 of 21 products launched in the last 360 days are still selling. 90-day search growth is +57.8%. Flapen's verdict: Worth a look (64/100).
- How competitive is the mermaid cup niche?
- 68 brands and 121 sellers compete. The top 5 products take 21% of clicks and top 5 brands hold 34% of demand.
- What do buyers complain about in mermaid cup?
- Top complaints mined from reviews: Leak-Proof, Durability, Size-Overall. The return rate is 0.8%.
- When does demand for mermaid cup peak?
- Demand peaks in Jul–Aug; the busiest month runs 2.3× the quietest.
- What does it cost to enter the mermaid cup niche?
- Listings span $4.94–$40.05; the average listing price is $18.44 (sweet spot $15–$100). The average incumbent carries 2,954 reviews — the moat a new listing must climb.