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.

Hydro Flask Sport Cap

Skip it

Brand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.

Review moat

Good678

avg incumbent reviews — the moat a new listing must climb

Avg price

Good$13.59

avg listing price — sweet spot $15–$100

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Conversion

Good4.5%

search→purchase rate — share of searches ending in a sale

Competition

Okay62%

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

Okay4.4%

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

Bad98%

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

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

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.

Peak months: Aug · busiest ÷ quietest = 1.8×

Open Trend

Top hydro flask sport cap search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

klean kanteen lid24K/yr -3.8%5.7% conv.
klean kanteen lid replacement5K/yr +10.6%4.8% conv.
klean kanteen lids4K/yr -3.6%4.9% conv.
klean kanteen cap4K/yr +5.1%5.3% conv.
kleen canteen lid4K/yr -0.8%8.4% conv.
hydroflask sport lid2K/yr -1.7%7.4% conv.
hydro flask sport cap1K/yr +122.7%5.7% conv.
hydroflask sports caps204/yr +81.0%0.0% conv.

All 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.

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

Klean Kanteen Classic Steel Loop Cap Leak-Proof Dishwasher-Safe BPA-Free Brushed Stainless

Klean Kanteen$14.394.7★189 rev

Sport Cap 3.0 - Black

Klean Kanteen$11.794.4★480 rev

Klean Kanteen Classic Flip Seal Sport Cap with Metal Straw 100% Leakproof BPA-Free Steady Flow

Klean Kanteen$14.023.7★72 rev

Klean Kanteen Wide Loop Cap with Bale - Dishwasher Safe Stainless Steel Bottle Cap - Compatible with Wide Mouth Bottles - Black

Klean Kanteen$11.534.5★111 rev

Bamboo Cap - Brushed Stainless

Klean Kanteen$16.584.7★194 rev

Newest

by launch date

Stainless and bamboo lid compatible with Klean Kanteen classic narrow mouth bottle

canbeyond$9.805 rev

7mo ago

Klean Kanteen Classic Flip Seal Sport Cap with Metal Straw 100% Leakproof BPA-Free Steady Flow

Klean Kanteen$14.0272 rev

1y ago

Auto Flip Lid for Hydro Flask Standard Mouth Bottle Spout lid for HydroFlask Narrow Mouth Bottle Replacement Lid with Button Lock Black

EIPOSAU$9.47345 rev

1y ago

Klean Kanteen TKWide Twist Cap with Straw Kit - Reusable Straw Lid - Premium Water Bottle Accessories - Leak Proof & Dishwasher Safe - Black

Klean Kanteen$19.2066 rev

2y ago

Klean Kanteen TKWide Twist Cap with Straw Kit - Reusable Straw Lid - Premium Water Bottle Accessories - Leak Proof & Dishwasher Safe - Taupe

Klean Kanteen$19.0666 rev

2y ago

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-Overall28%

“Fits perfectly”

Leak-Proof20%

“Leak proof”

Advertised Vs Actual Product9%

“Does its job”

Ease Of Cleaning5%

“Easy to clean”

Quality-Overall5%

“Excellent quality”

Value For Money5%

“Great buy”

Material Quality4%

“Love that this has no plastic”

Ease Of Use3%

“Nice easy to use cap”

Compatibility-Overall1%

“Works perfect with my older model (2013) Klean Kanteen stainless steel thermos”

Strength1%

“Sturdy and nice looking”

What buyers complain about

Leak-Proof17%

“These leak”

Durability9%

“Both of these broke with in 2 months”

Quality-Overall9%

“Honestly pretty terrible lid”

Ease Of Use8%

“Cannot close the lid”

Advertised Vs Actual Product7%

“Different from prior purchase”

Size-Overall6%

“The hole is too small to drink normally”

Functionality-Overall5%

“The cap doesnt work for me despite what I try”

Ease Of Cleaning4%

“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 Quality3%

“the outside looks like it's plastic”

Temperature Retention3%

“this top does not keep it cold at all”

Top return reasons

Size-Overall75%

Advertised Vs Actual Product7%

Leak-Proof3%

Compatibility-Overall3%

Functionality-Overall2%

Value For Money1%

Defective Material/Parts1%

Ease Of Use1%

Material Quality1%

Mechanism Issues1%

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.