18 oz plastic cups
Skip itA small market ($65K/yr) — this niche doesn't clear our bar today.
Returns
Incredible0.5%return rate — above 5% kills the launch gate
Conversion
Great7.9%search→purchase rate — share of searches ending in a sale
Avg price
Great$15.25avg listing price — sweet spot $15–$100
Price range
Good$4.72–$35.82cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Good+25.0%90-day search growth — must beat 0% to launch
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Review moat
Bad4,326avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Market size
Bad$65K$65K/yr · 54K searches
According to Flapen's Amazon United States niche tracking, 18 oz plastic cups is a $65K/yr Amazon United States market (54K searches/yr). The top 5 brands hold 89% of demand. Verdict: Skip it — 49/100.
Data updated Jul 13, 2026 · scored weekly · How we score niches
18 oz plastic cups market data
- Units sold / yr
- 6K–8K
- avg 250–500/product
- Revenue / yr
- $92K–$122K
- units × avg price
- Conversion rate
- 7.9%
- Avg BSR
- #317
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 67%
- Out of stock
- 0.0%
- Avg brand age
- 40 months
- Avg seller age
- 141 days
Competition & brand share
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
12 falling
Sellers
79
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
54%
Top 20: 96%
Open market
8%
- Amazon Basics39%
- Hefty37%
- SOLO6%
- Qeirudu5%
- Nicole Home Collection3%
- Jycnolm2%
- Open — no brand owns it (6 brands, 8%)
Demand & seasonality
Weekly Amazon search volume, last 67 weeks — +25.0% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top 18 oz plastic cups search terms
- 18 oz plastic cups24K/yr
- 18oz plastic cups13K/yr
- plastic cups 18 oz7K/yr
- 18 oz cups5K/yr
- 18 oz clear plastic cups5K/yr
Top 18 oz plastic cups 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.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Amazon Basics Disposable Red Plastic Party Cups BPA-Free 18oz for Birthdays BBQs and Events 120 Count
Amazon Basics$10.824.7★5,340 rev
Amazon Basics Sturdy Disposable Plastic Party Cups for Cold Drinks Red 18oz 50 Count BPA-Free
Amazon Basics$5.014.7★5,340 rev
Hefty Party Perfect Clear Plastic Cups Large Clear Party Cups for Easy Cleanup and Large Gatherings Recyclable 18 Ounce 28 Count
Hefty$5.794.8★127 rev
Hefty Party Perfect Clear Plastic Cups 18 Ounce 140 Count
Hefty$13.074.8★1,760 rev
Amazon Basics Disposable Clear Plastic Cups for Cold Drinks BPA-Free Easy to Hold 16oz 50 Count
Amazon Basics$4.804.7★6,269 rev
Newest
by launch date
Qeirudu 100 Pack 18 oz Round Bottom Clear Plastic Cups with Lids and Straws Disposable Iced Coffee Cups To Go Cups for Cold Drinks Smoothie Juice Milkshake
Qeirudu$25.6647 rev
Jycnolm [100 Sets - 18oz Round Bottom Clear Plastic Cups with Lids and Straws Disposable Iced Coffee Cups with Lids To Go Cold Drink Cups for Smoothies Juices Party Catering
Jycnolm$26.0865 rev
Jycnolm 18 Oz Round Bottom Clear Plastic Cups with Sip Lids 50 Sets Disposable Iced Coffee Cups with Strawless Lids To Go Cold Drink Cups for Smoothies Juices Party Catering
Jycnolm$17.3156 rev
Qeirudu 18 Oz Round Bottom Clear Plastic Cups with Strawless Sip Lids 50 Pack Disposable Iced Coffee Cups To Go Cups for Cold Drinks Smoothie Juice Milkshake
Qeirudu$18.2484 rev
Hefty Party Perfect Clear Plastic Cups 18 Ounce 140 Count
Hefty$13.071,760 rev
Trending
90-day click momentumJycnolm 18 Oz Round Bottom Clear Plastic Cups with Sip Lids 50 Sets Disposable Iced Coffee Cups with Strawless Lids To Go Cold Drink Cups for Smoothies Juices Party Catering
Jycnolm$17.314.2★
Qeirudu 100 Pack 18 oz Round Bottom Clear Plastic Cups with Lids and Straws Disposable Iced Coffee Cups To Go Cups for Cold Drinks Smoothie Juice Milkshake
Qeirudu$25.664.4★
![Freshware Clear Plastic Cups [100 Pack - 20 oz] Disposable Cups for Iced Coffee Smoothie Milkshake Cold Drinks](https://m.media-amazon.com/images/I/41Z-uFvlTGL.jpg)
Freshware Clear Plastic Cups [100 Pack - 20 oz] Disposable Cups for Iced Coffee Smoothie Milkshake Cold Drinks
Freshware$12.484.6★
Jycnolm [100 Sets - 18oz Round Bottom Clear Plastic Cups with Lids and Straws Disposable Iced Coffee Cups with Lids To Go Cold Drink Cups for Smoothies Juices Party Catering
Jycnolm$26.084.3★
Nicole Home Collection 100 Count Disposable Plastic Cups Crystal Clear Durable PET 18 oz. BPA Free
Nicole Home Collection$31.174.7★
What buyers say about 18 oz plastic cups
What buyers praise and complain about, mined from review topics.What buyers love
“Decent quality”
“Decent price”
“Seems sturdy”
“Great size”
“Colors are bright”
“Durable and cute”
“As advertised”
“Easy to use”
“preventing any spills”
“these puppies are thick”
What buyers complain about
“Not the right size”
“Little flimsy”
“Not thick at all”
“Not very well made”
“they leak”
“The straws are so hard to open”
“Waste of Money”
“cheap cheap material”
“This was absolutely awful tasted horrible was stale and gross”
“Not as pictured”
Top return reasons
Common questions
- Is 18 oz plastic cups profitable to sell on Amazon United States?
- The niche generates $65K/yr across 24 tracked products. 3 of 4 products launched in the last 360 days are still selling. 90-day search growth is +25.0%. Flapen's verdict: Skip it (49/100).
- How competitive is the 18 oz plastic cups niche?
- 12 brands and 79 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in 18 oz plastic cups?
- Top complaints mined from reviews: Size-Overall, Strength, Thickness. The return rate is 0.5%.
- When does demand for 18 oz plastic cups peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the 18 oz plastic cups niche?
- Listings span $4.72–$35.82; the average listing price is $15.25 (sweet spot $15–$100). The average incumbent carries 4,326 reviews — the moat a new listing must climb.