---
title: "Hydro Flask Sport Cap — $2K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/sports-outdoors/hydro-flask-sport-cap"
last_updated: "2026-08-12T07:43:48.296Z"
locale: en
meta:
description: "Amazon product research for hydro flask sport cap: $2K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for hydro flask sport cap: $2K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Hydro Flask Sport Cap — $2K/mo Amazon US Product Research"
---
# **Hydro Flask Sport Cap**
**Skip it**
Brand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.
Market size 7Growth 26Conversion 54Competition 39Returns 32Price range 38Avg price 63Brand share 5Review moat 71Quality gap 62
**Review moat**
**Good****678**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Good****$13.59**
avg listing price — sweet spot $15–$100
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****4.5%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****62%**
top-5 click share — leaders hold, buyers still browse
**Price range**
**Okay****$8.08–$19.20**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Okay****4.4%**
return rate — above 5% kills the launch gate
**Growth**
**Okay****+0.8%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$26K**
$26K/yr · 43K searches
**Brand share**
**Bad****98%**
top-5 brand share — brand-locked demand
## **Is hydro flask sport cap profitable on Amazon?**
According to Flapen's Amazon United States niche tracking, hydro flask sport cap is a $26K/yr Amazon United States market (43K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in Aug. Verdict: Skip it — 35/100.
Data updated Jul 26, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **hydro flask sport cap market size & sales**
Units sold, revenue, conversion and listing quality across the tracked shelf.
- **Units sold / yr**
- **3K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$34K–$41K**
- units × avg price
- **Conversion rate**
- **4.5%**
- **Avg BSR**
- **#790**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **89%**
- **Out of stock**
- **3.7%**
- **Avg brand age**
- **52 months**
- **Avg seller age**
- **144 days**
## **Competition: brands, sellers & click share**
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**7 **▲rising
**Sellers**
**141**
**Top-5 brand share**
**98%**
Top 20: 100%
**Top-5 click share**
**62%**
Top 20: 100%
**Open market**
**1%**
- Klean Kanteen90% - Hydro Flask4% - canbeyond2% - EIPOSAU1% - Prurex1% - NuRich1% - Open — no brand owns it (1 brand, 1%)
## **hydro flask sport cap demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +0.8% search growth over the last 90 days.
2K1KHoliday '24Prime Day '25Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Aug · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/us/sports-outdoors/hydro-flask-sport-cap/trend)
## **Top hydro flask sport cap search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **klean kanteen lid**24K/yr-3.8%5.7% conv. - **klean kanteen lid replacement**5K/yr+10.6%4.8% conv. - **klean kanteen lids**4K/yr-3.6%4.9% conv. - **klean kanteen cap**4K/yr+5.1%5.3% conv. - **kleen canteen lid**4K/yr-0.8%8.4% conv. - **hydroflask sport lid**2K/yr-1.7%7.4% conv. - **hydro flask sport cap**1K/yr+122.7%5.7% conv. - **hydroflask sports caps**204/yr+81.0%0.0% conv. [**All search terms **](https://flapen.com/research/us/sports-outdoors/hydro-flask-sport-cap/search-terms)
## **Top hydro flask sport cap 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%$1K10%$3K15%$4K20%$5K1101001K10K Reviews — right = deep review moatMarket 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.
### **Top sellers**
by 90-day click share
[1**Klean Kanteen Classic Steel Loop Cap Leak-Proof Dishwasher-Safe BPA-Free Brushed Stainless**Klean Kanteen**$14.39**4.7★189 rev](https://www.amazon.com/dp/B09L1GTCMT) [2**Sport Cap 3.0 - Black**Klean Kanteen**$11.79**4.4★480 rev](https://www.amazon.com/dp/B09B2WLVFZ) [3**Klean Kanteen Classic Flip Seal Sport Cap with Metal Straw 100% Leakproof BPA-Free Steady Flow**Klean Kanteen**$14.02**3.7★72 rev](https://www.amazon.com/dp/B0DSPPY9HG) [4**Klean Kanteen Wide Loop Cap with Bale - Dishwasher Safe Stainless Steel Bottle Cap - Compatible with Wide Mouth Bottles - Black**Klean Kanteen**$11.53**4.5★111 rev](https://www.amazon.com/dp/B09L1GSYS3) [5**Bamboo Cap - Brushed Stainless**Klean Kanteen**$16.58**4.7★194 rev](https://www.amazon.com/dp/B09B2VY8V3)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Stainless and bamboo lid compatible with Klean Kanteen classic narrow mouth bottle**canbeyond**$9.80**5 rev7mo ago](https://www.amazon.com/dp/B0G4V73Q55) [**Klean Kanteen Classic Flip Seal Sport Cap with Metal Straw 100% Leakproof BPA-Free Steady Flow**Klean Kanteen**$14.02**72 rev1y ago](https://www.amazon.com/dp/B0DSPPY9HG) [**Auto Flip Lid for Hydro Flask Standard Mouth Bottle Spout lid for HydroFlask Narrow Mouth Bottle Replacement Lid with Button Lock Black**EIPOSAU**$9.47**345 rev1y ago](https://www.amazon.com/dp/B0D3G71KSX) [**Klean Kanteen TKWide Twist Cap with Straw Kit - Reusable Straw Lid - Premium Water Bottle Accessories - Leak Proof & Dishwasher Safe - Black**Klean Kanteen**$19.20**66 rev2y ago](https://www.amazon.com/dp/B0CQPP5JNF) [**Klean Kanteen TKWide Twist Cap with Straw Kit - Reusable Straw Lid - Premium Water Bottle Accessories - Leak Proof & Dishwasher Safe - Taupe**Klean Kanteen**$19.06**66 rev2y ago](https://www.amazon.com/dp/B0CQPMS8RT)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Stainless and bamboo lid compatible with Klean Kanteen classic narrow mouth bottle**canbeyond**$9.80**5.0★**▲ 67%**](https://www.amazon.com/dp/B0G4V73Q55) [**Klean Kanteen Kids Cup Straw Lid 2-Pack - Food-Grade Silicone Cup Lids with Reusable Drinking Straws - Pink Tie Dye (Pack of 2)**Klean Kanteen**$16.21**4.6★**▲ 53%**](https://www.amazon.com/dp/B0BRV3Q579) [**Replacement Straw Lid for Hydro Flask Standard Mouth 18-24 oz BPA-Free Sport Cap with Soft Straw One-Hand Flip-Top for Sports/Hiking Compatible with Hydro Flask Simple Modern Klean Kanteen**VGHNQ**$8.08**4.5★**▲ 30%**](https://www.amazon.com/dp/B0C2ZCBB9J) [**Standard Mouth Sport Cap Black**Hydro Flask**$17.85**4.4★**▲ 29%**](https://www.amazon.com/dp/B00T6PTQ6Y) [**Prurex Replacement Lid for Hydroflask Klean Kanteen Simple Modern Wide Mouth Bottles Flask Cap for 12-64oz Sports Water Bottles Accessories (2 Pack**Prurex**$12.56**4.3★**▲ 28%**](https://www.amazon.com/dp/B0C5MGY8VV)
**~~View all trending →~~**
## **What reviews say buyers love and hate about hydro flask sport cap**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**28%
*“Fits perfectly”*
**Leak-Proof**20%
*“Leak proof”*
**Advertised Vs Actual Product**9%
*“Does its job”*
**Ease Of Cleaning**5%
*“Easy to clean”*
**Quality-Overall**5%
*“Excellent quality”*
**Value For Money**5%
*“Great buy”*
**Material Quality**4%
*“Love that this has no plastic”*
**Ease Of Use**3%
*“Nice easy to use cap”*
**Compatibility-Overall**1%
*“Works perfect with my older model (2013) Klean Kanteen stainless steel thermos”*
**Strength**1%
*“Sturdy and nice looking”*
### **What buyers complain about **
**Leak-Proof**17%
*“These leak”*
**Durability**9%
*“Both of these broke with in 2 months”*
**Quality-Overall**9%
*“Honestly pretty terrible lid”*
**Ease Of Use**8%
*“Cannot close the lid”*
**Advertised Vs Actual Product**7%
*“Different from prior purchase”*
**Size-Overall**6%
*“The hole is too small to drink normally”*
**Functionality-Overall**5%
*“The cap doesnt work for me despite what I try”*
**Ease Of Cleaning**4%
*“both of these brands caps have the rubber gasket set way into the inner groove of the cap where its impossible to remove for washing”*
**Material Quality**3%
*“the outside looks like it's plastic”*
**Temperature Retention**3%
*“this top does not keep it cold at all”*
### **Top return reasons **
**Size-Overall**75%
**Advertised Vs Actual Product**7%
**Leak-Proof**3%
**Compatibility-Overall**3%
**Functionality-Overall**2%
**Value For Money**1%
**Defective Material/Parts**1%
**Ease Of Use**1%
**Material Quality**1%
**Mechanism Issues**1%
## **Common hydro flask sport cap questions**
- **Is hydro flask sport cap profitable to sell on Amazon United States?**
- The niche generates $26K/yr across 19 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +0.8%. Flapen's verdict: Skip it (35/100).
- **How competitive is the hydro flask sport cap niche?**
- 7 brands and 141 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 98% of demand.
- **What do buyers complain about in hydro flask sport cap?**
- Top complaints mined from reviews: Leak-Proof, Durability, Quality-Overall. The return rate is 4.4%.
- **When does demand for hydro flask sport cap peak?**
- Demand peaks in Aug; the busiest month runs 1.8× the quietest.
- **What does it cost to enter the hydro flask sport cap niche?**
- Listings span $8.08–$19.20; the average listing price is $13.59 (sweet spot $15–$100). The average incumbent carries 678 reviews — the moat a new listing must climb.
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