Are Iron Flask Bottles Good?

Iron Flask (40oz)

Iron Flask

Highlights: Multiple lids included, affordable, colorful

What you'll learn:

Why is Iron Flask popular?
What makes Iron Flask good?
What is not good about Iron Flask?
How good is Iron Flask's insulation?
How durable are Iron Flask bottles?
Are Iron Flask bottles dishwasher safe?
Do Iron Flask bottles fit in cupholders?
What are alternatives to Iron Flask?

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Iron Flask Review

Overview

When Hydro Flask and similar insulated bottles exploded in popularity, it was natural to expect there would be more affordable options coming to market. Iron Flask quickly established itself as one of the most prominent alternatives on Amazon.

Frequently ranking near the top as one of the best-selling and most-reviewed bottles while still maintaining a 4.8 star rating is a true achievement, and the reason is primarily because of the value.

When you buy an Iron Flask, you get three lids so you can change them out and decide which one is best for you. So instead of paying over $40 for a bottle only to realize you want a different lid that costs another $15, you pay about $25 to get everything from the start.

Why Buy?

Multiple Lids Included: Iron Flask listings typically offer three lids that are included with each bottle. Be sure to check the listings because the lids have changed over time, and some listings have different combinations of lids.
Affordable: Even though you get more, the price is still very affordable compared to premium options like Hydro Flask.
Many Colors, including Gradients: This was one of the first brands we noticed that uses gradients instead of solid colors, and this helped them stand apart from many competitors.

Why Avoid?

Lids Don't Feel as Premium: Yes, you get three lids included, and that is helpful if you like to change how you use your bottle or you're not sure which one you'd like. However, the lids tend to feel cheaper and less premium compared to more premium brands. However, it appears Iron Flask updated their lids since we ordered ours, and it's worth noting that the new lids do look better.

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Iron Flask FAQs

Are Iron Flask bottles dishwasher safe? | No, Iron Flask recommends handwashing their bottles. See their FAQ here.
Are Iron Flask bottles safe? | Yes, Iron Flask's bottles are made with food-grade stainless steel and plastics.
Where are Iron Flask bottles made? | Iron Flask bottles are made in China.
Are Iron Flask bottles worth it? | Yes, Iron Flask bottles are a great value alternative at a lower price point compared to premium brands.
Are Iron Flasks BPA-free? | Yes, all Iron Flask products are made with BPA-free materials.
Do Iron Flasks contain lead? | Yes, according to testing by Lead Safe Mama. See her article here. However, the lead is only used in the solder to seal the bottle, which is fairly standard across the water bottle industry at this time. Realistically, there is an extremely small probablility that you would ever have an issue with lead unless your bottle was severely damaged, and in that case you would likely need a new bottle anyways because the insulation is probably lost and the bottle would be very dented and wobbly.
Do Iron Flask bottles fit in cupholders? | No, 32 and 40oz Iron Flasks are too wide to fit in the majority of cupholders. Consider getting an adapter like our BottlePro Max.

How Do You Clean an Iron Flask?

Video coming soon!
For now, check out our general cleaning guide for large stainless steel bottles.

Sip or Skip Stat Sheet

Our Sip or Skip stat sheets combine all the information above in one easy-to-use format to make comparing bottles easier.

Iron Flask Stat Sheet

See our Video Review

Video coming soon!

How to Buy an Iron Flask

Iron Flask (40oz)

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Popular Alternatives

Before you buy, it may be worth looking at these other options.

Hydro Flask

Hydro Flask Tumbler (40oz)

Very similar to Iron Flask, but with a straw lid that's easier to clean below the spout.

See on Amazon

Hydro Flask's Trail Series

Hydro Flask Trail Series (32oz)

Lighter and with a comfy, wide handle, this is one of the best insulated bottles for hiking.

See on Amazon

Owala's FreeSip

Owala FreeSip (32oz)

As the latest viral bottle, Owala has caught people's attention with an innovative lid and fun color combos.

See on Amazon

Helpful Resources

Compare

See what else is out there

Clean

Learn how to properly maintain your bottle

Recommended Accessories

Bottle Brush Kit

Great for your regular cleaning every 2-4 days.

This kit includes a large brush to clean in the bottle, a detailing brush to clean the threads and lid, a straw cleaner, and hangers so you can stay organized.

See on Amazon

Cleaning Tablets

Recommended to use these once per month.

In additional to regular weekly cleaning, deep-cleaning your bottle once per month is usually a good idea to prevent germs and buildup, especially around seals.

See on Amazon

Cup Holder Adapter

Usually needed for bottles over 3" diameter.

Our BottlePro Max has a twist-to-expand base, removable centralizing tabs, and a grip pad to help keep your bottle secure and by your side.

See on Amazon

And Just for Fun (and Better Tasting Water)

Fruit Infuser

As a bonus, check out our FlavorFuze Pod drop-in fruit infuser to make your water fun! Skip the soda or flavor pods with artificial sweeteners (like Cirkul) and add healthy flavors with natural fruit each day. The pod is easy to remove when you're done thanks to a big handle on top, making for a healthy mid-day snack.

It comes with two lids. One is a splash-guard style lid that fits in wide mouth Hydro Flasks, and the other is a drop-in style lid that fits in nearly all wide mouth bottles (including Owala FreeSips, YETI Ramblers, Stanley Quenchers, Hydro Flasks, and many more).

See on Amazon