Hydro Flask 32oz Wide Mouth Insulated Water Bottle with Flex Straw Lid
🔥 #45 in Insulated Water Bottles · New The iconic insulated everyday bottle
Hydro Flask 40oz Wide Mouth Insulated Water Bottle with Flex Straw Lid
Hydro Flask 3.9
#45
in Insulated Water Bottles
$46.22 →
As of Jul 8, 2026
AI-estimated. See how we score. How we score Affiliate link — we may earn a commission
01 / Spec
Top features
MaterialDouble-wall vacuum-insulated 18/8 stainless steel
Capacity40 oz
Cold RetentionDouble-wall vacuum (cold 24h+, hot 12h+)
The Hydro Flask 40oz Wide Mouth Flex Straw Lid is a double-wall vacuum-insulated stainless steel bottle designed for everyday carry. It keeps drinks cold for 24+ hours and hot for 12+ hours, backed by the brand's category-defining reputation.
Key features:
- Wide-mouth opening for easy filling and cleaning
- Flex Straw Lid with non-spill, leakproof design
- Refillable and durable stainless steel construction
- Available in vibrant colorways (Agave shown)
Fit: Best for all-day hydration enthusiasts, gym-goers, and outdoor users who value insulation and trusted build quality. The wide mouth and straw lid suit both sipping and chugging.
Trade-offs: Premium price (~$46) reflects brand heritage and insulation performance; heavier than basic plastic bottles; straw lid has more parts to clean than a simple cap.
02 / Signals
Why it's hot
Category icon—trusted insulation and leak-proof design, widely beloved.
- Value for money 82
- Review rating & velocity 94
- Community sentiment 97
- Brand reputation 100
- Search heat 87
- Est. return & defect rate 92
03 / Verdict
Pros & cons
Pros
- True leak-proof seal with Flex Straw Lid
- Excellent cold retention (24h+)
- Wide mouth for easy cleaning and refilling
- Durable stainless steel—withstands drops and dents
- Category-defining brand trusted by hydration community
- Versatile for sipping and swigging
- Keeps drinks at desired temperature all day
- Available in vibrant colorways
Cons
- Premium price ($46) vs. basic plastic bottles
- Heavier than single-wall or plastic alternatives
- Straw lid has multiple parts requiring thorough cleaning
- Can develop condensation (sweating) on exterior in warm weather
- Not exceptional value vs. mid-tier insulated competitors
MaterialDouble-wall vacuum-insulated 18/8 stainless steel
Capacity40 oz
Cold RetentionDouble-wall vacuum (cold 24h+, hot 12h+)
Lid Spout TypeFlex Straw Lid (non-spill, leakproof)
Leak ProofYes—sealed straw lid
Cold Retention24+ hours
Hot Retention12+ hours
DimensionsApprox. 10" tall, 3.2" diameter
WeightApprox. 1.3 lbs (full)
Fits Cup HolderNo—wide body exceeds standard holders
Dishwasher SafeBottle yes, lid hand-wash recommended
Bpa FreeYes
05 / Your take
How was Hydro Flask 40oz Wide Mouth Insulated Water Bottle with Flex Straw Lid?
Share your own experience to help other shoppers. Takes under a minute.
Thanks for your feedback!
Collected privately to sharpen our research — never published, and it doesn't affect rankings.
05 / Compare
Compare the best alternative
One useful head-to-head in Insulated Water Bottles, with the rows most likely to separate the contenders.
Open full comparison → 
Owala FreeSip Sway 40oz Insulated Tumbler
Leakproofness
Leak-proof seal (no spills in a bag) Leak-proof push-button lid Most leakproof
Cold Retention (hr)
Temperature retention (cold 24h+ / hot 12h+) Coldest longest 24-hour ice retention
Capacity (oz)
Capacity & size-range fit (cup-holder to all-day) Largest 40oz single size
06 / Rivals
Compare with
07 / Variations
Other colors & sizes
Top pick
Hydro Flask 32oz Wide Mouth Insulated Water Bottle with Flex Straw Lid
32 Oz · Agave
#34 in Insulated Water Bottles
Hydro Flask 40oz Wide Mouth Insulated Water Bottle with Flex Straw Lid
#35 in Insulated Water Bottles
Hydro Flask 24oz Wide Mouth Flex Straw Lid Water Bottle (Dew)
24 Oz · Dew
#39 in Insulated Water Bottles
Hydro Flask 32oz Wide Mouth Insulated Water Bottle, Lupine
32 Oz · Lupine
#42 in Insulated Water Bottles
Hydro Flask 32oz Wide Mouth Straw Bottle — Fossil Brown
#55 in Insulated Water Bottles
Hydro Flask 32oz Wide Mouth Insulated Water Bottle with Flex Straw Lid
32 Oz · Dew
#57 in Insulated Water Bottles
Hydro Flask 32oz Wide Mouth Bottle with Straw Lid — Stone
32 Oz · Stone
#80 in Insulated Water Bottles
Hydro Flask 40 oz Wide Mouth Stainless-Steel Insulated Bottle with Straw Lid
40 Oz · Black
#88 in Insulated Water Bottles
Hydro Flask 32oz Wide Mouth Bottle with Flex Straw Cap – Berry
32 Oz · Berry
#90 in Insulated Water Bottles
Hydro Flask 24 Oz Wide Straw Cap Insulated Water Bottle – Berry
24 Oz · Berry
#151 in Insulated Water Bottles
Hydro Flask 24oz Wide Flex Straw Cap Insulated Water Bottle
24 Oz · Agave
#178 in Insulated Water Bottles
08 / Browse
More in Insulated Water Bottles
Owala FreeSip Sway 40oz Insulated Tumbler
Insulated Water Bottles
#1 of 48
As of Jul 8, 2026 
Owala FreeSip 24oz Insulated Tumbler
Insulated Water Bottles
#2 of 48
Owala FreeSip 40oz Insulated Tumbler
Insulated Water Bottles
#3 of 48
As of Jul 8, 2026 
Nalgene 32oz Tritan Wide Mouth Bottle (Eggplant)
Insulated Water Bottles
#4 of 48
As of Jul 8, 2026 
Owala FreeSip 24oz Insulated Water Bottle
Insulated Water Bottles
#5 of 48
As of Jul 8, 2026 
Hydro Flask 64 oz Wide Mouth Insulated Water Bottle (White)
Insulated Water Bottles
#6 of 48
09 / Explore
