Stanley vs Hydro Flask

Direct Competitor Brief · Insulated drinkware · Amazon US

10 ASINs (top 5 per brand) · Neutral analyst view · May 21, 2026

#2
▲ Shelf dominance
Stanley best BSR (Quencher 30oz)
#314
▲ Improving vs 90d
Hydro best tumbler BSR
3.5×
Unit velocity gap
Stanley top-5 est. units/mo
131K
Hydro branded search/mo
"hydro flask" volume
Lead differential. Stanley’s Quencher line anchors Kitchen & Dining at BSR #1–2 with ~8K+ units/mo on the hero 30oz SKU alone. Hydro Flask holds strong branded search (131K/mo, ~60% combined SoV) and runs deeper promotional pricing on the 40oz Travel Tumbler, with BSR improving from ~900 toward #314 over 90 days.

Head-to-head metrics

Est. monthly units (top 5 ASINs sum)Stanley ~24K · Hydro ~7K
StanleyHydro FlaskHero review count
Combined SoV on own branded keywordStanley 68% · Hydro 60%
3P seller depth (hero ASINs)Stanley 2 · Hydro 8–12

Stanley — top 5 ASINs

ASINBSRUnits/moPrice
B0CP9YB3Q428,000$25.00
B0CRMP3RQT26,000$33.75
B0CV64341S25,000$32.99
B0DR9ML5X9274,000$26.25
B0DCDZP98B61,000$30.00

Hydro Flask — top 5 ASINs

ASINBSRUnits/moPrice
B0D8K3RKZD6392,000$40.43
B0C353845H3142,000$19.98
B07YXM6XTF391,000$24.99
B07YXLXX7S391,000$19.96
B0G9B99RP2198900$29.99

Demand trajectory (90d BSR — hero ASINs)

Lower BSR = stronger demand · B0CP9YB3Q4 (Stanley Quencher 30oz) vs B0C353845H (Hydro 40oz Travel Tumbler)

Pricing posture

  • Stanley Quencher 30oz at $25.00 — ~22% below 180d avg ($32.15)
  • Hydro 40oz tumbler at $19.98 — ~38% below 180d avg ($32.30)
  • Both brands use MAP-hidden pricing on core SKUs
  • Hydro runs steeper headline discount on hero tumbler

Buy Box & supply

  • Stanley: Amazon.com holds Buy Box on sampled ASINs; 1–8 sellers
  • Hydro: Amazon.com on hero tumbler; 32oz variants show 10–15 sellers
  • No OOS flags on hero ASINs in current batch
  • Stanley tighter 1P control; Hydro wider 3P offer pools

PDP integrity — hero ASINs (live)

Stanley · B0CP9YB3Q4

  • ★ 4.7 · 93,054 reviews · 8K+ bought/mo
  • 5 bullets · A+ · brand story
  • 7 images · 6 videos
  • #1 Insulated Tumblers · #2 Kitchen
  • Amazon's Choice

Hydro Flask · B0C353845H

  • ★ 4.7 · 10,896 reviews · 2K+ bought/mo
  • 6 bullets · A+ · brand story
  • 11 images · 7 videos
  • #7 Insulated Tumblers · #314 Kitchen
  • Amazon's Choice

Key differentials

Demand

Stanley’s Quencher 30oz sits at BSR #2 Kitchen & Dining with ~8K est. units/mo; Hydro’s comparable 40oz Travel Tumbler is BSR #314 with ~2K units/mo — a material velocity gap on tumbler-format heroes.

Reviews

Stanley carries ~8.5× more reviews on the hero Quencher parent line (93K vs 11K on Hydro’s 40oz tumbler) — substantially thicker social proof on the flagship SKU.

Branded search

Hydro Flask owns the larger branded query pool ("hydro flask" ~131K/mo vs "stanley quencher" ~5.5K/mo). Stanley dominates its niche term at 68% combined SoV; Hydro at 60% on the branded head term.

Pricing

Hydro’s hero tumbler shows a deeper discount vs trailing average (~38% below 180d) than Stanley’s Quencher (~22%) — different promotional intensity on MAP-priced core SKUs.

Channel

Hydro Flask hero SKUs show more active 3P sellers (8–15 vs Stanley’s 1–8 on top ASINs) — wider offer pools on comparable listings.

Strategic implications (neutral)

Stanley’s Amazon position is velocity- and rank-led on the Quencher franchise; Hydro Flask competes on branded search scale, aggressive tumbler pricing, and improving BSR on the Travel Tumbler. Neither brand shows PDP content gaps on hero SKUs — the gap is shelf rank, review depth, and unit concentration.

If you represent Stanley

Defend #1–2 BSR with supply continuity; monitor 3P on the few multi-seller Quencher colorways; conquest Hydro’s discount-led tumbler traffic only where margin allows.

If you represent Hydro Flask

Harvest branded search with conversion-focused ads; sustain price promotions on Travel Tumbler while pushing BSR from #314 toward top-100 Kitchen; tighten 3P where unauthorized sellers appear.

Confidence note: Comparison from public Amazon data (Keepa catalog + live PDP). Coverage limited to top 5 ASINs per brand. Off-Amazon DTC, wholesale, and retail are not visible.