Hydro Flask 64 oz Wide Mouth Water Bottle - Leakproof Straw

In this review of the Hydro Flask 64 oz Wide Mouth with Flex Straw Cap, the bottom line is simple: it is a heavy-duty, insulated hydration bottle for people who want a large, cold supply of water on the go. The single biggest reason to buy is the combination of a 64 oz capacity and TempShield double-wall vacuum insulation that keeps drinks cold up to 24 hours, making it ideal for long outings, work shifts, or shared use across a day. The review covers real-life handling, cleaning, and the one notable tradeoff around the straw cap.

Key Features

• 64 oz capacity: The large volume means fewer refills and is convenient for long hikes, shifts, or days when access to water is limited.
• TempShield insulation: Double-wall vacuum insulation preserves cold temperatures up to 24 hours for sustained refreshment without condensation on the exterior.
• Flex Straw Cap: A flexible, closeable straw lid offers one-handed sipping and a comfortable carry handle for easy transport.
• Leakproof when closed: The straw cap clicks shut to help prevent spills when tossed into a bag or carried during travel.
• Durable stainless steel: Pro-grade stainless construction resists flavor transfer and stays clean so water tastes fresh each time.
• Dishwasher safe: The bottle and disassembled straw lid can be cleaned in the dishwasher without losing bright color.

Who It's For

The Hydro Flask 64 oz wide mouth is best for users who need a large, durable insulated bottle: hikers, athletes, people working long shifts, or families who share a refillable bottle. The size and insulation particularly suit anyone who prioritizes keeping beverages cold all day and who wants a sturdy bottle that stands up to frequent dishwasher cleaning.

Those who want a compact bottle for a small cup holder or who frequently drink hot beverages should look elsewhere, since the Flex Straw Cap is not intended for hot liquids and the 64 oz size can be cumbersome in tight spaces.

Pros & Cons

Pros

• Keeps drinks cold for up to 24 hours thanks to reliable TempShield insulation.
• Large 64 oz capacity reduces the need to refill during long days.
• Durable stainless steel construction resists odors and flavor transfer.
• Dishwasher safe and colorfast for easy cleaning and maintenance.

Cons

• Some users report mixed experience with leak resistance around the vent or straw, so it is best to ensure the cap is fully closed before tossing into a bag.
• The 64 oz size can be bulky and may not fit all cup holders or small daypacks.

Specifications

Capacity	64 oz
Insulation	TempShield double-wall vacuum insulation
Lid type	Wide Mouth with Flex Straw Cap (closeable straw)
Material	Pro-grade stainless steel, BPA-free
Temperature performance	Keeps drinks cold up to 24 hours
Care	Dishwasher safe; disassemble straw lid for cleaning

Our Verdict

The Hydro Flask 64 oz Wide Mouth with Flex Straw Cap delivers dependable cold retention, robust stainless construction, and a capacious 64 oz volume that makes it excellent value for anyone who needs long-lasting hydration. It is a smart buy for outdoorsy users and busy days, though those worried about occasional straw cap venting or who need hot-beverage compatibility should consider other lid options or smaller sizes.

Frequently Asked Questions

Is the straw lid leakproof?
The Flex Straw Cap is leakproof when closed, but some reviewers note mixed real-world results around the vent area, so always click it fully shut before carrying in a bag.

Can it keep ice and drinks cold all day?
Yes, the TempShield double-wall vacuum insulation keeps drinks cold up to 24 hours and the wide mouth fits ice cubes easily.

Is the bottle dishwasher safe?
Yes, the bottle and disassembled straw lid are dishwasher safe and designed to retain color when cleaned in a dishwasher.