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Hydro Flask Wide Flex Cap Black 40 Oz

  • Based on 3,389 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Jun 26
Order within 8 hours and 53 minutes
Available payment plans shown during checkout

Style: 40 Oz


Color: Black


Features

  • 40 OZ WATER BOTTLE: The stainless steel insulated reusable water bottle keeps drinks cold for 24 hours, and hot up to 12. This Hydro Flask bottle is dishwasher safe and easy to clean.
  • 24 HOURS COLD. 12 HOURS HOT: Double-wall vacuum insulation keeps drinks hot or cold for hours. The insulated bottle keeps beverages cold for 24 hours and hot up to 12. The TempShield insulation keeps the water bottle cool to the touch.
  • LEAKPROOF: Say goodbye to leaky water bottles. The Hydro Flask Flex Cap is leakproof when closed. Toss it into your bag without worry.
  • PURE TASTE: Durable pro-grade stainless steel ensures pure taste and no leftover flavor transfer. So, today's water won't have any taste of yesterday's iced tea.
  • DISHWASHER SAFE: Easy to use and easy to clean, just toss the lid and bottles into the dishwasher. Designed to keep bright color, being dishwasher safe means your favorite Hydro Flask is always at-the-ready.

Description

Stainless steel, insulated, refillable, reusable—our wide-mouth water bottle is the flask to grab to keep cold drinks cold and hot ones hot. The large opening makes it easy to add ice—and get yourself a bigger gulp.

Brand: Hydro Flask


Capacity: 40 Fluid Ounces


Color: Black


Recommended Uses For Product: Water


Special Feature: Cold 24 Hours, Leakproof, Dishwasher Safe, Hot 12 Hours


Brand: ‎Hydro Flask


Capacity: ‎40 Fluid Ounces


Color: ‎Black


Recommended Uses For Product: ‎Water


Special Feature: ‎Cold 24 Hours, Leakproof, Dishwasher Safe, Hot 12 Hours


Age Range (Description): ‎Adult


Product Dimensions: ‎3.55"W x 12.7"H


Model Name: ‎40 OZ WIDE FLEX CAP


Item Weight: ‎1.48 ounces


Theme: ‎Solid


Material: ‎STEEL


Number of Items: ‎1


Pattern: ‎Bottle


Included Components: ‎bottle, lid


Product Care Instructions: ‎Hand Wash Only


Base Diameter: ‎3.6 Inches


Cap Type: ‎Flex Cap


With Lid: ‎Yes


Is Dishwasher Safe: ‎Yes


UPC: ‎810007831770


Manufacturer: ‎Hydro Flask


Is Microwaveable: ‎No


Item Package Dimensions L x W x H: ‎11.61 x 4.06 x 3.9 inches


Package Weight: ‎0.58 Kilograms


Item Dimensions LxWxH: ‎3.55 x 3.55 x 12.7 inches


Brand Name: ‎Hydro Flask


Warranty Description: ‎LIFETIME


Suggested Users: ‎Unisex-Adult


Part Number: ‎W40BTS001


Model Year: ‎2020


Style: ‎40 Oz


Size: ‎40 Ounces


Date First Available: January 4, 2020


Frequently asked questions

The Hydro Flask Wide Mouth Bottle with Flex Cap is made from high-quality 18/8 pro-grade stainless steel. This type of steel is recognized for its strength and purity, ensuring the bottle does not give off any flavors to your drink.

The Hydro Flask Wide Mouth Bottle is available in various sizes, but the most popular are the 32oz and 40oz variations.

Yes, the Hydro Flask bottle comes with TempShield Insulation. This technology keeps liquids icy cold for up to 24 hours and hot drinks hot for up to 12 hours.

Yes, the Flex Cap is designed to be leak-proof, making the Hydro Flask bottle convenient for transport without worrying about spills.

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


The Hydroflask product reviews suggest mixed feelings among users. They appreciate the product's ability to keep beverages ice cold for long periods and its capacity to meet drinking needs. However, there are concerns about the quality of certain Hydroflask products, with users identifying possible counterfeit items, issues with denting and rusting, as well as missing features in recent models.

Pros

  • 👍 Keeps beverages ice cold for extended periods.
  • 👍 Good for everyday use.
  • 👍 Does not transfer weird taste to the beverage.
  • 👍 Available in different colors.
  • 👍 Easy to clean.

Cons

  • 👎 Some units displayed signs of rusting.
  • 👎 Suspected presence of counterfeit items.
  • 👎 Some received already dented items.
  • 👎 Questions about its durability due to easy denting.
  • 👎 Recent models missing features present in old models.

Should I Buy It?

While the Hydroflask offers solid benefits like temperature retention and everyday usability, significant inconsistencies relating to product quality have been raised. If choosing to purchase, ensure to do so from a reputable dealer to avoid counterfeits and pay close attention to product handling to mitigate the denting concern. If these considerations don't dissuade you, it may be worth a try.


  • Great product
I have been using it daily for over a year. It's leak-proof and keeps ice from melting all day. I have dropped it multiple times without any problems. I love its sleek design and perfect size. Durability is spot on!!
Reviewed in the United States on January 20, 2025 by Big Kahuna

  • get these!
amazing! leakproof and keeps my liquids cold or hot as needed
Reviewed in the United States on May 9, 2025 by Krys Maynard Krys Maynard

  • Love my hydro flask!
Oh man, let me tell you about my love affair with this Hydro Flask water bottle. It's the real deal. First of all, it keeps my drink cold all day long. I mean, I can fill it up with ice water in the morning, leave it in my car for hours in the scorching sun, and come back to a still practically cold drink. It's like magic. And don't even get me started on how durable this thing is. I've dropped it more times than I care to admit, and it still looks and functions just fine. It's like it's made of some sort of indestructible material. But you know what really sets this water bottle apart? The colors. I mean, have you seen the colors? They're so bright and bold, it's like carrying around a little ray of sunshine with you wherever you go. I have this water bottle in 4 different ones, the teal is my favorite, but I use the black one at the office! Overall, I am absolutely smitten with this Hydro Flask. It's the perfect combination of style and substance. If you're in the market for a water bottle that will change your life (okay, maybe that's a bit dramatic), then look no further. You won't regret it. ... show more
Reviewed in the United States on February 22, 2023 by Essie Shine

  • Great water bottle
As advertised
Reviewed in the United States on January 23, 2025 by Placeholder

  • Hydro Flask
I pleaded with my son to give me his 32 oz Hydro flask (black). It looked so sleek and neat. It turned out to be so much easier for me to keep water with me at all times. I can put it in my purse which I love. I have since ordered my own 40 oz from Amazon and it is my favorite. The wide mouth makes it easy for me to wash and add ice from the ice machine. The water stays cold for 2 days. I like to crunch ice so I make them up a day prior to use so the ice has softened a bit. I've had ice last 3 days. It's very easy to carry around by the handle. I bought a green one for my coffee but it just keeps the coffee too hot for my preference. I felt like it got even hotter than when I made it. Currently thinking about getting a pink one. ... show more
Reviewed in the United States on May 13, 2023 by Roslyn

  • High Quality and Well Insulated
I have two of these in various sizes. They do a nice job of keeping water cold over a day or so. They are also very easy to clean. The screw on cap is interchangeable between some of the sizes so I don't have to rummage around or try and find what fits what bottle. Durable and very solid to use.
Reviewed in the United States on August 18, 2024 by Brady Sladek

  • Great bottle
I've had it for a while (opted for the larger size) and it's been great. Drinks have stayed cold for over a day nearly while I've been on job sites doing overnighters. I've also put hot soup in it and it's stayed hot like I just poured it from the stove top. You do need to use a bottle brush to clean thoroughly if you put anything other than water in it though - dissolved material i.e. sugar, etc. Likes to cling to the side if it's not washed thoroughly. No leaking from my experience, canteen like sling would be nice to have for backpacking/hiking. ... show more
Reviewed in the United States on March 22, 2022 by Robert

  • Good
I like it
Reviewed in the United States on April 12, 2025 by John ramos

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