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Hydro Flask Standard Mouth 21oz vs Hydro Flask Standard Mouth 24oz
Hydro Flask Standard Mouth 21oz ($40) vs Hydro Flask Standard Mouth 24oz ($39.95) — side-by-side specs, weight, pros and cons to help you pick the right water bottle.
Spec-by-spec
| Spec | Hydro Flask Standard Mouth 21oz | Hydro Flask Standard Mouth 24oz |
|---|---|---|
| Price | $40 | $39.95 |
| Weight | 320g | 376.5g |
| Capacity | 21oz (621ml) | — |
| Insulation | TempShield double-wall vacuum | — |
| Cold | Up to 24 hours | — |
| Hot | Up to 12 hours | — |
| Material | 18/8 pro-grade stainless | 18/8 stainless steel |
| Finish | Powder coat chip-resistant | — |
| Weight | 320g | 376.5g (Hydro Flask published) |
Pros & Cons
Hydro Flask Standard Mouth 21oz
- TempShield 24h cold insulation proven
- Powder coat durable finish
- 21oz fits standard bottle pockets
- Standard Mouth sip-direct or use a straw lid
- Wide Hydro Flask accessory ecosystem
- $40 — not budget hydration
- 320g solid weight
- Standard Mouth less versatile than wide for cleaning
Hydro Flask Standard Mouth 24oz
- Insulated stainless body
- Mid-size 24 oz capacity
- Large color range
- 376.5 g empty
- Published weight is rounded to 0.01 lb
Hydro Flask Standard Mouth 24oz is the better value at $39.95. If weight matters most, Hydro Flask Standard Mouth 21oz carries lighter at 320g. Both are part of our curated water bottle index — tap through to check current pricing.
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