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Hydro Flask 21oz Standard Mouth vs Hydro Flask Wide Mouth 32oz

Hydro Flask 21oz Standard Mouth ($40) vs Hydro Flask Wide Mouth 32oz ($45) — side-by-side specs, weight, pros and cons to help you pick the right water bottle.

Hydro Flask 21oz Standard Mouth
Hydro Flask
21oz Standard Mouth
$40
Best Mid-Size
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Hydro Flask Wide Mouth 32oz
Hydro Flask
Wide Mouth 32oz
$45
Verified 2026
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Spec-by-spec
SpecHydro Flask 21oz Standard MouthHydro Flask Wide Mouth 32oz
Price$40$45
Weight308g428g
Capacity21oz (621ml)—
InsulationTempShield double-wall—
Cold24h ice retention—
Hot12h—
MouthStandard—
LidFlex Straw Cap included—
Pros & Cons

Hydro Flask 21oz Standard Mouth

  • 21oz fits most bag bottle pockets
  • 24h ice retention is real
  • Flex Straw Cap best in class
  • No condensation ever
  • Hundreds of color options
  • $40 for a bottle is a lot
  • 308g medium weight
  • Standard mouth harder to clean

Hydro Flask Wide Mouth 32oz

  • —
Hydro Flask 21oz Standard Mouth is the better value at $40. Both are part of our curated water bottle index — tap through to check current pricing.
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