---
title: "Mermaid Cup — $5K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/sports-outdoors/mermaid-cup"
last_updated: "2026-08-12T15:44:56.371Z"
locale: en
meta:
description: "Amazon product research for mermaid cup: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for mermaid cup: $5K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Mermaid Cup — $5K/mo Amazon US Product Research (2026)"
---
# **Mermaid Cup**
**Worth a look**
Shows 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.
Market size 16Growth 74Conversion 39Competition 94Returns 96Price range 71Avg price 84Brand share 96Review moat 35Quality gap 35
**Brand share**
**Incredible****34%**
top-5 brand share — no brand owns this niche
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Competition**
**Great****21%**
top-5 click share — an open shelf
**Avg price**
**Great****$18.44**
avg listing price — sweet spot $15–$100
**Growth**
**Good****+57.8%**
90-day search growth — must beat 0% to launch
**Price range**
**Good****$4.94–$40.05**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Okay****3.1%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****2,953.68**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****$64K**
$64K/yr · 111K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
## **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 ~~](https://flapen.com/research/methodology)
## **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.
5K3KSpike '24Holiday '24Spike '25Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jul, Aug · busiest ÷ quietest = 2.3×
[**Open Trend **](https://flapen.com/research/us/sports-outdoors/mermaid-cup/trend)
## **Top mermaid cup search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **mermaid cups**29K/yr+66.0%2.2% conv. - **mermaid water bottle**31K/yr+78.5%3.0% conv. - **mermaid cup**17K/yr+27.2%0.9% conv. - **little mermaid water bottle**10K/yr+36.3%3.5% conv. - **mermaid water bottle for girls**16K/yr+27.3%2.8% conv. - **mermaid party cups**5K/yr+62.5%2.7% conv. - **mermaid cups for party**3K/yr+98.6%2.3% conv. [**All search terms **](https://flapen.com/research/us/sports-outdoors/mermaid-cup/search-terms)
## **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.
0%2%$1K4%$3K6%$4K8%$5K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$21.77**4.6★8,369 rev](https://www.amazon.com/dp/B0FG5LTK1N) [2**SANDJEST Mermaid Kids Water Bottle With Straw Lid 12oz Insulated Stainless Steel Travel Tumbler Gifts For Girls Birthday Christmas Back To School**SANDJEST**$17.87**4.4★593 rev](https://www.amazon.com/dp/B0F2MY53PR) [3**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**$17.03**4.6★5,035 rev](https://www.amazon.com/dp/B0C1C626FR) [4**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**$17.23**4.4★593 rev](https://www.amazon.com/dp/B0CQM5WDNQ) [5**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**$24.01**4.6★8,369 rev](https://www.amazon.com/dp/B0F9QPSK62)
**~~View all top sellers →~~**
### **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**$20.49**41 rev3mo ago](https://www.amazon.com/dp/B0GM6VHTSN) [**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**$19.93**4 rev6mo ago](https://www.amazon.com/dp/B0GHMRYYBF) [**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**$12.32**111 rev6mo ago](https://www.amazon.com/dp/B0GH471G9T) [**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**$23.80**12 rev6mo ago](https://www.amazon.com/dp/B0GH15S9QV) [**24 Mermaid Party Favors Cups with Lids and Mermaid Tail Straws Decorations**FZR Legend**$26.76**9 rev7mo ago](https://www.amazon.com/dp/B0GCK4VJPV)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Mermaid Kids Insulated Stainless Steel Water Bottle 16 Oz Travel Tumbler for School Sports for Girls Birthday Back To School**SANDJEST**$20.49**4.5★**▲ 225%**](https://www.amazon.com/dp/B0GM6VHTSN) [**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**$23.80**4.6★**▲ 222%**](https://www.amazon.com/dp/B0GH15S9QV) [**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**$19.93**5.0★**▲ 222%**](https://www.amazon.com/dp/B0GHMRYYBF) [**24 Mermaid Party Favors Cups with Lids and Mermaid Tail Straws Decorations**FZR Legend**$26.76**4.0★**▲ 209%**](https://www.amazon.com/dp/B0GCK4VJPV) [**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**$12.32**4.6★**▲ 156%**](https://www.amazon.com/dp/B0GH471G9T)
**~~View all trending →~~**
## **What reviews say buyers love and hate about mermaid cup**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Color**17%
*“The colors are also really beautiful”*
**Quality-Overall**9%
*“Good Quality”*
**Value For Money**8%
*“Worth It”*
**Size-Overall**7%
*“Perfect size”*
**Strength**6%
*“Nice and sturdy”*
**Durability**6%
*“Durable and Cute”*
**Leak-Proof**5%
*“completely leak-proof”*
**Advertised Vs Actual Product**5%
*“As shown”*
**Gifting Purpose**4%
*“Christmas present”*
**Design-Overall**4%
*“Love the black and white design”*
### **What buyers complain about **
**Leak-Proof**15%
*“leaks like crazy”*
**Durability**10%
*“It will break easily”*
**Size-Overall**9%
*“The cups were smaller than I expected”*
**Strength**5%
*“Fragile”*
**Quality-Overall**4%
*“they look cheap”*
**Ease Of Cleaning**4%
*“However, cleaning this thing is a total nightmare”*
**Value For Money**3%
*“Total waste of money”*
**Thickness**3%
*“But the plates are thin”*
**Taste-Overall**3%
*“The cups made whatever I poured in them taste funny”*
**Ease Of Use**2%
*“Dents very easily”*
### **Top return reasons **
**Size-Overall**31%
**Value For Money**12%
**Leak-Proof**12%
**Color**9%
**Advertised Vs Actual Product**6%
**Quality-Overall**4%
**Product Condition**3%
**Functionality-Overall**3%
**Material Quality**2%
**Smell**2%
## **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.
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