Iron Flask 40 oz Dark Rainbow Stainless Steel Water Bottle
Iron Flask 40 oz Dark Rainbow Stainless Steel Water Bottle
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Iron Flask 40 oz Dark Rainbow Stainless Steel Water Bottle

Key item features

  • Premium Construction: Crafted from 18/8 premium grade stainless steel, ensuring durable and long-lasting use.
  • Temperature Retention: Features double-walled vacuum insulation, keeping beverages cold for up to 24 hours and hot for up to 12 hours.
  • Versatile Lids: Includes two BPA-free lids: a Flex Straw Lid and a Spout Lid, offering convenient drinking options.
  • Portable Design: Equipped with a high-quality paracord handle, making the 40 oz bottle easy to carry.
  • Leakproof Performance: Designed to be leak-resistant and sweat-free, preventing condensation for active lifestyles.
  • Generous Capacity: Provides a net content of 40 fluid ounces, ideal for extended hydration needs.
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Current price is $24.9862.5 ¢/oz
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Customer ratings & reviews

4.7 out of 5 stars
stars701 ratings148 reviews
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Reviews summary

Pros

  • : Features a range of bright ambient colors.
  • : Keeps cold for several hours.
  • : Made of braided paracord for easy carrying.
  • : Made with durable materials for long-lasting use.

Neutral

  • : Can be secure, but may leak under stress or misuse.
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Showing 1-3 of 148 reviews

Oct 25, 2025
Lori
Top Reviewer
Item details
Color: Aurora
5 out of 5 stars review

Verified Purchase

Beautiful bottle ‼️

This is a beautiful bottle that hold liquids hot for 24 hours and cold for 24 hours. I really like the fact that you can choose which style of lid you want to use. I like the spout ~ without a straw to get dirty and have to clean ~ bc I usually add some type of powder nutrient like collagen or super greens and the powders have a tendency to stick to the inside of everything including the straw. Finally, I highly recommend this bottle. Looks like the aurora borealis northern lights which is why it's probably called aurora.

Helpful?3V7X5Z4MRL5I17527611141
Oct 8, 2025
Ani
Item details
Color: Twilight Blue
5 out of 5 stars review

Verified Purchase

My daughter who's in intermediate loves it. The different cover options. The handle %26 wristband for carrying.. even down to the color. She hasn't complained about it at all. She uses it everyday for school %26 training. So it's great. So if she's happy with it, I am too.

Helpful?3V7X5Z4MRL5I17527611141
Nov 17, 2025
Tracie
Top Reviewer
Item details
Color: Aurora
5 out of 5 stars review

Verified Purchase

I love the color of this bottle. it's a magical indigo blue mixed with a deep purple color. it's shimmery yet matte finished all at the same time. the bottle is the perfect size as well. not so gigantic and heavy to carry around, holds 40oz, which is a good amount of liquid. the braided handle is a nice touch and aids in being able to carry the bottle on your person where ever you go. you can open the strap and clip it onto something to help hold it easily; which is that I do a lot, on my walker. it is most certainly steel like the description states and it absolutely does keep ice for a good 24 hours. I have not had a need to put something hot into my cup yet to see how long it will keep things hot though but can come back at later date to update on that. all in all I'm impressed with the bottle. I can only see one flaw in it. they didn't do s good enough job in adhering the paint to the bottle, and I say that because when my bottle dropped to the grounda small piece of paint chipped off of it.

Helpful?3V7X5Z4MRL5I17527611141