Klean Kanteen vs Hydro Flask: Choose One!

When it comes to the world of insulated bottles and hydration systems, there are two brands that reign supreme – KleanKanteen Water Bottle and Hydro Flask. Both companies make high-quality products and have fan bases that claim their preferred company is the best. They both have a plethora of positive reviews which makes it tricky to decide which company has the best-insulated water bottle from.

High-quality insulated stainless steel bottles are an investment that should last for years. These aren’t cheap plastic bottles so it’s worth it to take the time to compare both reusable bottle lines to ensure you get the right one for your situation.

Before getting into a comparison of each brand’s reusable bottle strengths and weaknesses, here is a summary of bottle options, design, and features for you to choose your best hydration insulated partner.

Main Differences Between Klean Kanteen vs Hydro Flask

The main differences between Klean Kanteen vs Hydro Flask are:

  • Klean Kanteen lids screw inside of the bottle, whereas Hydro Flask lids are a cap that screws over top.
  • Klean Kantine lid can leak when used often, whereas Hydro Flask updated their bottle lids to a new Flex Cap.
  • Klean Kantine uses Climate Lock insulation, whereas Hydro Flask uses TempShield insulation.
  • Klean Kantine design is classic and simple with solid colors, whereas Hydro Flask has some fun limited edition colors. 

Quick Update on Pricing: The Hydro Flask is available here for discounted promos for a LIMITED TIME right now.

Our Pick
Our Pick
Our Pick

Main Differences Between the Klean Kanteen and Hydro Flask

There are not many differences between the Klean Kanteen and Hydro Flask, but the main differences are that the Hydro Flask features a new and improved cap design and only comes in double-wall insulated varieties. Klean Kanteen offers both single and double walls. 

Klean Kanteen Insulated Bottles

Klean Kanteen

  • Classic (standard) Klean Mouth – 12, 20, 32 or 64 oz
  • Wide Mouth – 12, 16, or 20 oz
  • Growler Style – 32 or 64 oz
  • Available in a variety of colors, in matte or stainless finish
  • Electropolished interior to prevent bad tastes
  • Klean keeps drinks cold up to 24 hours
  • Keeps drinks hot for up to 12 hours
  • BPA-free
  • Compatible with multiple accessories, including different caps

Klean Kanteen Classic Stainless Steel Single Wall Water Bottle | Amazon

This is the original, iconic, full stainless steel water bottle designed to last a lifetime. Created as a safe, BPA-free, nontoxic alternative to plastic water bottles over 10 years ago. Crafted from high quality, durable food grade 18/8 stainless steel with a wide 1. 75 inch (44mm) opening which is easy to fill, pour and drink from.

Buy at Amazon.com
We earn a commission if you click this link and make a purchase at no additional cost to you.

Hydro Flask Insulated Bottles

Hydro Flask

  • Standard Mouth – 12, 18, 21, or 24 oz
  • Hydro Flask Wide Mouth – 18, 32, or 40 oz
  • Growler – 64 oz
  • Available in a variety of colors, in powder-coated or classic stainless finish
  • Wide mouth bottles are compatible with most water filtration systems
  • TempShield technology
  • Keeps drinks cold for up 24 hours
  • Klean Kantine keeps drinks hot for up to 6 hours
  • Made of 18/8 stainless steel
  • BPA- and Phthalate-free Kantean insulated water bottle
  • Lifetime warranty
  • Compatible with multiple accessories, including different caps

Going by the above information it is easy to see how similar each brand’s insulated water bottles are to one another. With the details out of the way, let’s get into some of the major features and how each water bottle stack up against each other.

Usability and Care

First and foremost, for a great opening, the ease of use needs to be addressed. Both KleanKanteen and Hydro Flask have insulated bottles, for a hot or a cold drink, available in a variety of sizes, as well as standard mouth bottles or wide mouth. Whether you want a small bottle to drink your hot coffee to work in the morning or a huge bottle that will keep your ice-cold water chilled all day, you can find the right size.

The standard mouth bottles are best saved for those who need a durable bottle that is slim since these are thinner than the wide-mouth bottles. The downside of the standard mouth bottles is that they have a narrow mouth which means cleaning is more difficult. You also can’t put regular ice cubes in it to keep your drink cold.

The wide-mouth design is much more versatile. You can really pack in ice cubes and keep the bottle clean is much easier. Some people who go camping or maybe outdoor for the day will even pack their soups, stew, or chilis in the larger Growler wide mouth and the insulated body will keep the food or drink temperature.

However, the wide mouth is less likely to fix or fit in universal cup holders, backpack water bottle pockets, or on a bike.

Conclusion: It is truly a tie in this category. Klean Kantine and Hydro Flask water bottles are nearly identical except for a couple of differences in sizing between their respective standard mouth bottle and wide mouth options. Either way, you can find an easy-to-care-for bottle in the perfect size from either brand and choose the one that fits your needs.

Hydro Flask

Visual Design

While looks alone shouldn’t be the sole reason to choose a product, it can be useful as a final deciding factor if you really can’t pick between which bottle do you prefer for drinking water and stay hydrated daily.

Hydro Flask and KleanKanteen have a range of colors to choose from. They both have two different finishes as well, aside from the plain stainless steel metallic look. HF has the great option of a tough but attractive powder coating while KK has a matte satin finish. When it comes to color vividity, Hydro Flask has a bit of an edge but they lack KleanKanteen’s limited edition bottle designs.

Conclusion: It’s difficult to say which bottle looks better because it is a matter of personal preference, but based on color options and the habit of co-branding designs KleanKanteen is a winner.


Both Hydro Flask and KleanKanteen bottles have superior insulative properties compared to other brands. They are also very similar compared to one another.

Hydro Flask and KleanKanteen bottles both have the same double-walled design using the same 18/8 stainless steel. This double-walled vacuum construction is quite impressive as it keeps your beverages roughly the same temperature (Coldwater stays cold, hot water stays hot). Having double walls also means that your hands will be protected from heat or cold temperatures.

A common issue with regular stainless steel bottles is how they can get too hot or cold to touch comfortably, but these double-walled models solve this problem, so you will not have any problem with the temperature of your drink.

Hydro Flask’s TempShield technology guarantees that icy cold drinks will stay cold for up to 24 hours. KleanKanteen has the same guarantee for cold beverages. Where the two differ is with hot drinks like coffee. Hydro Flask has a 6-hour guarantee whereas KleanKanteen has a 12-hour guarantee.

Conclusion: If you plan on only using your bottle to keep water or other drinks cold temperature, either brand will work perfectly for you. But if you are looking for a bottle that will keep coffee, hot chocolate, cider, and other hot beverages warm pretty much all day, the Klean Kanteen insulated will be a better choice.


Durability is an important factor. If you’re going to spend $30 to $40 on something like a water bottle, you’re going to want to get a lot of use out of it and not worry about tossing it around.

Durability When it comes to Hydro Flask vs Klean Kanteen is fairly equal. As mentioned above, both bottles are made out of the same durable materials. The high-quality 18/8 stainless steel is resistant to dents and will stay looking great even after wear and tear. You can expect some scratches if you use it constantly, from accidental drops and the effects of daily life, but you’d really have to purposely abuse these bottles to damage them.

However, there is one thing to consider with durability – while the stainless steel body may be fairly invincible, the plastic caps are not as durable as the body. The Klean Kanteen lids screw inside of the bottle while the Hydro Flask lids are a cap that screws over top.

Hydro Flask recently updated their bottle lids to a new Flex Cap which functions better than Klean Kanteen’s design. The issue with the KK lid is that the plastic seal seems to be prone to leaking when used daily for a long time.

Klean Kanteen


How do I clean my stainless steel insulated water bottles?

“Use hot water, soap and a soft bottle brush – if there are no plastic parts in your stainless steal water bottle, you can even boil it…” Venkateswara Swamy, Quora

Note: Here’s our guide to cleaning the Hydro Flask. Also, note that both bottles are Dishwasher Safe.

Will insulated water bottles form condensation when filled with cold liquid on a hot summer day? 

“No. It’s double layered so no condensation.” Celeste, Double Wall Vacuum Insulated Klean Kanteen – Amazon

“A Hydro flask bottle is made of metal. It has double walls so you get no condensation on the outside.” Jane Bice, Hydro Flask Double Wall – Amazon

How long will Klean Kanteen keep drinks cool?

Under normal conditions the Klean Kanteen should keep drinks cool for about 5-8 hours, with the key variable being external termperatures the the frequency of opening (exposing to temperature differential). 

Final Take: Hydro Flask vs Klean Kanteen?

Both bottle bodies are essentially the same but a bottle is useless if it leaks. The Hydro Flask design wins for this factor due to its stronger cap.

Some other factors like price and accessory options can also help to make a decision. KleanKanteen and Hydro Flask bottles are both reasonably priced, but Klean Kanteen is a few dollars less expensive. Klean Kanteen has fewer accessory options which, for example, limits your ability to switch out caps. Hydro Flask has more cap options so if you don’t like the Flip Cap, just buy a different one.

Deciding on which bottle is best for drinking water and stay hydrated daily is difficult but it can be summed up that the Hydro Flask is more of a workhorse while the KleanKanteen is better for casual use. If you only want a pretty bottle of water or other drink like coffee, you’ll probably prefer the Klean Kanteen due to its design options.

If you are a very active individual, plan to take this hiking, camping or if you work in an outdoor environment, the Hydro Flask will serve you better for your durable cap.

Quick Update on Pricing: The Hydro Flask is available here with promos for a LIMITED TIME right now.

Other Vacuum Insulated Bottle Options

If either of these insulated bottles is not quite right for you, we’ve reviewed LOTS of Hydro Flask competitors which you can check out below:

S'well Stainless Steel Water Bottle | Amazon

S'well keeps your drinks cold for 24 hours or hot for 12, while giving back to those in need. S'well bottles are beautifully crafted and designed to last. Composed of 18/8 premium grade stainless steel, S'well bottles are insulated to eliminate condensation so they never sweat on your hands or in your bag.

Buy at Amazon.com
We earn a commission if you click this link and make a purchase at no additional cost to you.
02/14/2023 11:54 am GMT

Takeya Originals Vacuum-Insulated Stainless-Steel Water Bottle | Amazon

Takeya Originals Stainless Steel Water Bottle keeps beverages ice-cold for 24 hrs, and hot for up to 12 hrs with double-wall insulation. This BPA-Free, food-grade water bottle won’t transfer flavors and does not sweat.

Buy at Amazon.com
We earn a commission if you click this link and make a purchase at no additional cost to you.
02/14/2023 10:54 am GMT

Simple Modern Insulated Water Bottle | Amazon

Stay hydrated in style with a sleek bottle that takes care of your favorite drink. Simple Modern bottles are made of stainless steel and have double-walled insulation, which means your beverage will stay hot or cold for hours. Easily fill your bottle with ice and clean it through the wide mouth opening. Shop our huge selection of styles, sizes and colors to find the one that is perfect for your lifestyle.

Buy at Amazon.com
We earn a commission if you click this link and make a purchase at no additional cost to you.
02/14/2023 09:44 am GMT

Fifty/Fifty Double Wall Vacuum Insulated Water Bottle | Amazon

The stainless steel vacuum insulated double wall growlers by Fifty/Fifty are the ideal choice for carrying your beverage of choice. Whether you simply like to stay hydrated and want the largest water bottle out there, or you are looking for the perfect way to carry home that new micro brew, we’ve got you covered. 

Buy at Amazon.com
We earn a commission if you click this link and make a purchase at no additional cost to you.
02/14/2023 07:54 pm GMT

Leave a Reply

Your email address will not be published. Required fields are marked *