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Are you still scouring for the best water bottle? Iron Flask might put an end to your search. Its popularity on Amazon caught our attention, so we had to test it.

The Iron Flask Water Bottle can keep your coffee piping hot for hours and your iced drink cold for over a day. At least on paper.

After 6 months of testing this bottle on and off, we have a pretty good idea of what it can and cannot do. 6 months later the price has also gone up as it continues to outsell other major brands online.

Read on to find our updated assessment of this best-selling, insulated water bottle.

Our Overall Review

We have thoroughly tested - and read reviews from other experts and users. In summary, this is what we think:

4.7

Reasons to buy:

  • check-mark
    Leak-proof & cool looking colors
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    The opening is wide enough for ice cubes and sauces
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    Cubes stay solid and coffee stays hot for most of a day
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    Double-wall insulation also means no outside condensation
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    Easy to clean even though it requires hand washing
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    Powder-coated for good grip
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    It comes with three different lids and two extra straws
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    Competitive price
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    Lifetime warranty

Reasons NOT to buy:

  • check-markThe straw lid is poorly designed
  • check-markOnly the straw lid has a carrying handle with clip

Where to buy:

iron-flask-water-bottle-product-image-2.jpg

Iron Flask Water Bottle

Modern design meets functionality.

The first impression of this stainless steel water bottle is that the box is impressive and the feel of it all is nice too. It’s immediately apparent why this is a popular item.

Iron Flask is currently available in six sizes: 14 oz., 18 oz., 22 oz., 32 oz., 40 oz., and 64 oz. You can grab them in colorful variations. You choose from cotton candy, aquamarine, bubblegum, dark rainbow, fire, fire red, kiwi green, midnight black, peach, sky, and twilight blue (we most love the hues of dark rainbow!).

The ones between 14 oz. and 22 oz. are the best for your daily use. Sneak it in your backpack’s water bottle holder and let them sit in your car’s cup holder, no problem. The big tumblers over 22 oz. are ideal for the outdoors.

If you know you won’t have any source of water nearby, they’re your best option. But if you hate adding extra weight to your journey, you can take a look at Brita Premium Filtering Water Bottle as an alternative.

With double-wall insulation, Iron Flask can keep your cold beverage ice-cold for more than 24 hours. We dropped some ice cubes inside, and they stayed whole until the following day! That’s way better than YETI Rambler Water Bottle’s capacity! Your beloved cappuccino will remain hot for up to 12 hours as well. If you like taking coffee to work, Iron Flask will be a wise choice.

 

Because of the wide mouth, Iron Flask is great as a food thermos. These Eggs Benedict had hot Hollandaise on them, thanks to the Iron Flask, which kept the sauce warm for an hour without any leaks.

Even though Iron Flask’s straw lid is the only one with a carrying handle, the powder coating of this tumbler makes the vessel of 22 oz. and smaller bottles easy to carry. But if you want to stay hands-free, you’ll benefit from getting a CONTIGO Autoseal Chill Water Bottle or Takeya 24 oz. Originals Insulated Water Bottle.

Iron Flask won’t let you down with its performance. The modern design didn’t compromise its functionality.

It’s a steal for anyone looking for a durable water bottle with a sleek look.

Iron flask details-1

Specs & Features

  • Material: 18/8 stainless steel
  • Available in 14 oz., 18 oz., 22 oz., 32 oz., 40 oz., and 64 oz.
  • Available colors: cotton candy, aquamarine, bubblegum, dark rainbow, fire, fire red, kiwi green, midnight black, peach, sky, and twilight blue
See the complete list of the best Water Bottle here!
iron-flask-water-bottle-multi-purpose

A Reliable Flask?

Do you like bringing your coffee for your mid-day break at work? Iron Flask can keep it warm for you for up to unlit lunchtime! Your ice-cold drink will stay chilled for more than a day! Pour in some ice cubes for more chilliness. You can expect that even after an overnight stay in Sedona grounds, you’ll have a refreshing drink the following afternoon.

It’s also an affordable alternative if you’re tight on budget. Iron Flask found the sweet point between price and quality.

But if you’re looking for a water bottle with proper water intake in mind, using Iron Flask can be counterproductive. It will tempt you to chug up flavored drinks, whether it’s hot or cold. A basic tumbler like Nalgene Wide Mouth Water Bottle is a good option. It will restrict you to water only with its lack of insulation.

You can count on Iron Flask to satisfy your thirst. It’s a must-have whether you’re in the bustling downtown or venturing past beyond the shores for some fishing escapade.

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Related Reviews

How does it compare to other water bottles?

Iron Flask Water Bottle is 18/8 pro-grade stainless steel made. It’s a common material used for water bottles with double-wall insulation. Hydro Flask, Yeti, Klean Kanteen, Cirkul, and TAKEYA also have their stainless steel tumblers. Health-wise, it’s safe (BPA-free), rust-resistant, and doesn’t add any metal taste to your drink. Although, this material is notorious for denting.

It won’t wear out quickly compared to a cheap plastic water bottle and doesn’t have any plastic taste to your beverage.

This tumbler from Iron Flask is also very easy to use. No matter which cap you choose for the day, drinking is easy-peasy. The carabiner straw and flip lid are accessible within your fingertips. Both offer you controlled flow with every chug. The stainless steel lid opens when you unscrew it counterclockwise. Be mindful you might tilt it too quickly and end up pouring everything on yourself.

These options are Iron Flask’s extra edge over water bottles that only come in with a single lid. It’s like getting Hydro Flask’s 16 oz. Wide Mouth’s sip lid and Thermoflask Double Stainless Steel Insulated Water Bottle’s straw lid. Plus, Nalgene’s wide mouth screw lid. All in one package!

But keep in mind that only the straw lid of Iron Flask has a carrying handle. It’s solid and carabiner-friendly, serving you with a comfortable 2-finger grip. The other caps don’t have any handles. You’ll either place them inside your backpack or carry them by vessel. It’s powder-coated anyway, so you won’t have a hard time holding it.

Unless you have the bigger bottles, then you won’t have any trouble. If you focus on a comfy handle, Hydro Flask’s Flex Handle won’t let you down.

Now, let’s talk about maintenance. Iron Flask doesn’t need any special cleaner like Brita Premium Filtering Water Bottle. But, it’s not dishwasher-safe as YETI Rambler Water Bottle or CONTIGO Autoseal Chill Water Bottle is. Hand washing Iron Flask is relatively a breeze anyway. Use soap with hot water to avoid damaging its powder coating. No need to dismantle anything like how you would with a Hydro Flask 16 oz. Wide Mouth with Sip Lid.

Overall, Iron Flask is one of the best and most affordable tumblers out there. Just a carrying handle could be of use with it.

Iron Flask Details 8

Conclusion

With a budget-friendly price range ($22 – $30), Iron Flask returns your investment in spades. You get durability and reliability.

It serves its purpose. Although, you need extra caution with its maintenance since the powder-coating is delicate.

It’s cheaper than the competitor Hydro Flask 24 oz. Standard Mouth (roughly $35) with almost the same quality.

Bonus, you get three lids for what you paid in a single purchase!

For some reason, your Iron Flask ended up damaged? They have a lifetime warranty to cover you.

There’s an Iron Flask for you whether you plan to take it to the office or on a weekend camping trip.

iron-flask-water-bottle-good-for-any-weather

Our Overall Review

We have thoroughly tested - and read reviews from other experts and users. In summary, this is what we think:

4.7

Reasons to buy:

  • check-mark
    Leak-proof & cool looking colors
  • check-mark
    The opening is wide enough for ice cubes and sauces
  • check-mark
    Cubes stay solid and coffee stays hot for most of a day
  • check-mark
    Double-wall insulation also means no outside condensation
  • check-mark
    Easy to clean even though it requires hand washing
  • check-mark
    Powder-coated for good grip
  • check-mark
    It comes with three different lids and two extra straws
  • check-mark
    Competitive price
  • check-mark
    Lifetime warranty

Reasons NOT to buy:

  • check-markThe straw lid is poorly designed
  • check-markOnly the straw lid has a carrying handle with clip
FAQ

Frequently asked questions

Where is Iron Flask manufactured?

Iron Flask is made in the People’s Republic of China.

It is common for stainless steel water bottles. Even American brands like Hydro Flask, Takeya, Klean Kanteen, CONTIGO, and Cirkul are all China-made. Manufacturing this product in the US will double the production cost, making it impossible to market.

And no, they don’t bear the stereotypical low-quality misconception of “Made in China” items. No worries about its build.

How do I clean my Iron Flask?

Your Iron Flask’s powder-coating is the main reason why your tumbler can’t go inside your dishwasher. The entire process and high temperature are brutal on the coating.

Instead, gently brush your iron Flask and clean it using hot water with soap. Now, if you notice spots inside the bottle (stainless steel is rust-resistant anyway), you can put distilled vinegar and shake it for 10 minutes. If that extra effort still didn’t work, use water with baking soda while brushing.

The lids are safe to sit on your dishwasher’s top rack.

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