---
title: "Mouthwash Cup — $4K/mo Amazon US Product Research (2026)"
canonical_url: "https://flapen.com/research/us/health-household/mouthwash-cup"
last_updated: "2026-08-12T11:14:25.010Z"
locale: en
meta:
description: "Amazon product research for mouthwash cup: $4K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for mouthwash cup: $4K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Mouthwash Cup — $4K/mo Amazon US Product Research (2026)"
---
# **Mouthwash Cup**
**Worth a look**
Shows low returns (0.8%), but a small market ($46K/yr) keeps it on the watch list.
Market size 11Growth 19Conversion 76Competition 69Returns 96Price range 60Avg price 40Brand share 84Review moat 56Quality gap 30
**Returns**
**Incredible****0.8%**
return rate — above 5% kills the launch gate
**Brand share**
**Great****51%**
top-5 brand share — no brand owns this niche
**Conversion**
**Great****7.2%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****44%**
top-5 click share — leaders hold, buyers still browse
**Price range**
**Good****$4.87–$29.95**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****1,261.64**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Okay****$10.79**
avg listing price — sweet spot $15–$100
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-12.8%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$46K**
$46K/yr · 59K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%")
## **Is mouthwash cup profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, mouthwash cup is a $46K/yr Amazon United States market (59K searches/yr). The top 5 brands hold 51% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 13, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **mouthwash 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**
- **$32K–$43K**
- units × avg price
- **Conversion rate**
- **7.2%**
- **Avg BSR**
- **#492**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **86%**
- **Out of stock**
- **0.5%**
- **Avg brand age**
- **37 months**
- **Avg seller age**
- **159 days**
## **Competition: brands, sellers & click share**
The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**36 **▼falling
**Sellers**
**57**
**Top-5 brand share**
**51%**
Top 20: 84%
**Top-5 click share**
**44%**
Top 20: 74%
**Open market**
**45%**
- RACETOP17% - Brandon-super10% - BONLONG10% - Amazon Basics9% - YEEHAW6% - MOUMOULIFE4%
## **mouthwash cup demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -12.8% search growth over the last 90 days.
2K2K seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/health-household/mouthwash-cup/trend)
## **Top mouthwash cup search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **mouthwash cup**27K/yr-11.9%3.7% conv. - **dental cups**9K/yr-23.3%6.3% conv. - **mouth wash cup**6K/yr-2.8%3.4% conv. - **paper shot cups**5K/yr+15.2%7.8% conv. - **2 oz bathroom cups**4K/yr-28.0%5.4% conv. - **3 oz**3K/yr-0.4%1.9% conv. - **3oz**3K/yr-0.6%1.2% conv. - **small water cups disposable 3 oz**2K/yr-67.0%3.4% conv. [**All search terms **](https://flapen.com/research/us/health-household/mouthwash-cup/search-terms)
## **Top mouthwash 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%5%$2K10%$5K15%$7K20%$9K101001K10K 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![RACETOP [100 Pack] 3 oz Bathroom Paper Cups Disposable Paper Cups Mouthwash Cups Paper Coffee Cups Ideal for Bathroom](https://m.media-amazon.com/images/I/21csAp-1QwL.jpg)**RACETOP \[100 Pack\] 3 oz Bathroom Paper Cups Disposable Paper Cups Mouthwash Cups Paper Coffee Cups Ideal for Bathroom**RACETOP**$6.51**4.2★5,598 rev](https://www.amazon.com/dp/B0C7G99J9P) [2**Amazon Basics Mini Disposable Clear Plastic Cups 3oz 100 Count**Amazon Basics**$5.36**4.6★816 rev](https://www.amazon.com/dp/B0FD1153NS) [3![Brandon-super [100 Count - 2 oz] Small Paper Cups Mouthwash Cups Bathroom Cups Mini Cups Small Disposable Cups](https://m.media-amazon.com/images/I/31NctahFxXL.jpg)**Brandon-super \[100 Count - 2 oz\] Small Paper Cups Mouthwash Cups Bathroom Cups Mini Cups Small Disposable Cups**Brandon-super**$6.88**4.7★1,881 rev](https://www.amazon.com/dp/B0C4KYJRJX) [4**BONLONG 2 oz Lead-Free Glass Mouthwash Cup Set of 3**BONLONG**$9.01**4.8★36 rev](https://www.amazon.com/dp/B0FCM4ZNST) [5**MOUMOULIFE Disposable Paper Coffee Cups 3 oz 100 Count Bathroom Mouthwash Cups Leak-Proof Small Paper Cups for Bathroom & Espresso**MOUMOULIFE**$5.81**4.6★1,764 rev](https://www.amazon.com/dp/B0DDTNXQHR)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Turbo Bee 600 Pack 3 oz Plastic Bathroom Cups Leakproof Disposable Mouthwash Cups Small PP Plastic Cups for Bathroom Rinse Dental Rinse Guest Bathroom**Turbo Bee**$19.32**45 rev7mo ago](https://www.amazon.com/dp/B0G33Y3VJ6) [**Amazon Basics Mini Disposable Clear Plastic Cups 3oz 100 Count**Amazon Basics**$5.36**816 rev8mo ago](https://www.amazon.com/dp/B0FD1153NS) [**Glad for Kids Disney Princess Disposable Mini Paper Cups for Bathroom Rinsing and Parties Heavy Duty Soak Proof Paper Cups for Kids Colorful Princess Designs 3 Ounce 100 Count Kids Drinkware**Glad**$5.56**473 rev9mo ago](https://www.amazon.com/dp/B0FTJT1WFD) [**Henry Schein Disposable Cups 5 oz Blue (200 Count) Dental Rinse Cups Double-Coated for Durability Latex-Free Embossed Grip Ideal for Medical Office and Event Use**Henry Schein**$11.66**79 rev9mo ago](https://www.amazon.com/dp/B0FSQ8Y3Q6) [**PACKINNO 3 oz Disposable Paper Cups Mouthwash Cups Small Coffee Cups for Bathroom Rinsing Mini Water Drinking Cups for Espresso Samples 200 Pack**PACKINNO**$6.47**630 rev12mo ago](https://www.amazon.com/dp/B0FHKSD85P)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Glad for Kids Disney Princess Disposable Mini Paper Cups for Bathroom Rinsing and Parties Heavy Duty Soak Proof Paper Cups for Kids Colorful Princess Designs 3 Ounce 100 Count Kids Drinkware**Glad**$5.56**4.8★**▲ 288%**](https://www.amazon.com/dp/B0FTJT1WFD) [**Turbo Bee 600 Pack 3 oz Plastic Bathroom Cups Leakproof Disposable Mouthwash Cups Small PP Plastic Cups for Bathroom Rinse Dental Rinse Guest Bathroom**Turbo Bee**$19.32**4.8★**▲ 236%**](https://www.amazon.com/dp/B0G33Y3VJ6) [**Henry Schein Disposable Cups 5 oz Blue (200 Count) Dental Rinse Cups Double-Coated for Durability Latex-Free Embossed Grip Ideal for Medical Office and Event Use**Henry Schein**$11.66**4.5★**▲ 140%**](https://www.amazon.com/dp/B0FSQ8Y3Q6) [**METAPRINT 100 Pack 3 oz Bathroom Cups Disposable Paper Cups with Rolled Rim Small Paper Mouthwash Cup for Guest Bathrooms Vanity & Office Use Mist blue**METAPRINT**$6.68**4.3★**▲ 128%**](https://www.amazon.com/dp/B0FCLFJXR1) [**Family Wellness Denture Cup DENTAL BATH with Strainer Basket For Dentures Retainers Mouthguards 1 Count**Family Wellness**$4.87**4.6★**▲ 118%**](https://www.amazon.com/dp/B09V9L7YRM)
**~~View all trending →~~**
## **What reviews say buyers love and hate about mouthwash cup**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**14%
*“Excellent Product”*
**Size-Overall**12%
*“Fits perfectly”*
**Value For Money**12%
*“much cheaper”*
**Advertised Vs Actual Product**12%
*“Accurate description”*
**Ease Of Use**8%
*“Its easy to handle”*
**Strength**6%
*“Simple and sturdy”*
**Design-Overall**3%
*“vivid design”*
**Durability**3%
*“They were durable for using in the bathroom”*
**Ease Of Cleaning**3%
*“easy cleanup”*
**Color**3%
*“Very nice and colors are pretty”*
### **What buyers complain about **
**Size-Overall**14%
*“Don't fit”*
**Durability**9%
*“Fall apart”*
**Quality-Overall**9%
*“Not well made”*
**Leak-Proof**8%
*“THEY LEAK”*
**Ease Of Use**7%
*“It is hard to open”*
**Strength**6%
*“extremely flimsy”*
**Dispensing Mechanism**6%
*“did t dispense anything”*
**Value For Money**4%
*“Not worth $9”*
**Adhesion/Stickiness**4%
*“stick together really bad”*
**Advertised Vs Actual Product**2%
*“Misrepresented”*
### **Top return reasons **
**Size-Overall**62%
**Dispensing Mechanism**8%
**Advertised Vs Actual Product**5%
**Value For Money**5%
**Functionality-Overall**2%
**Material Quality**2%
**Quality-Overall**2%
**Leak-Proof**2%
**Defective Material/Parts**2%
**Color**2%
## **Common mouthwash cup questions**
- **Is mouthwash cup profitable to sell on Amazon United States?**
- The niche generates $46K/yr across 44 tracked products. 3 of 8 products launched in the last 360 days are still selling. 90-day search growth is -12.8%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the mouthwash cup niche?**
- 36 brands and 57 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 51% of demand.
- **What do buyers complain about in mouthwash cup?**
- Top complaints mined from reviews: Size-Overall, Durability, Quality-Overall. The return rate is 0.8%.
- **When does demand for mouthwash cup peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the mouthwash cup niche?**
- Listings span $4.87–$29.95; the average listing price is $10.79 (sweet spot $15–$100). The average incumbent carries 1,262 reviews — the moat a new listing must climb.
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