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💧 Stay cool, stay hot, stay ahead with Iron Flask!
The IRON °FLASK 40 oz Wide Mouth Water Bottle combines premium 18/8 stainless steel with double-wall vacuum insulation to keep beverages cold for 24 hours or hot for 12. Featuring a leak-proof straw lid with a carabiner clip, it offers sweat-free, spill-free hydration on the go. Its durable, BPA-free construction and vibrant Aurora tie-dye design make it the perfect gift and essential companion for active professionals and outdoor enthusiasts alike.














| ASIN | B0F1TLBPH3 |
| Additional Features | Cold 24 Hours, Leakproof, Rust Resistant, Sweatproof, Vacuum Insulated |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #434 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1 in Camping & Hiking Hydration Flasks |
| Brand | IRON °FLASK |
| Brand Name | IRON °FLASK |
| Cap Type | Sports Cap |
| Capacity | 2.5 pounds |
| Color | Aurora |
| Customer Reviews | 4.8 out of 5 stars 65,612 Reviews |
| Included Components | Handle, Lid |
| Item Type Name | camping-botas-and-flasks |
| Manufacturer | IRON °FLASK |
| Material Type | Stainless Steel |
| Model Name | Wide Mouth Straw 40 oz 1 Lid |
| Number of Items | 1 |
| Pattern | Tie-Dye |
| Product Care Instructions | Hand Wash Only |
| Recommended Uses For Product | Water |
| Special Feature | Cold 24 Hours, Leakproof, Rust Resistant, Sweatproof, Vacuum Insulated |
| UPC | 810082489934 |
| Unit Count | 1 Count |
W**E
Exactly What I Was Looking For
This Iron Flask 40oz insulated water bottle was exactly what I was looking for. I work in public safety and am not always near the station to refill my water bottle and wanted something that would allow me a couple refills but keep the water cold until I needed it. This does exactly that. I used a 20oz shaker bottle as a water bottle, so this gives Iron Flask bottle gives me two refills until I need to fill it up again. It is the perfect size to keep on my passenger seat without taking up much room at all. I have not had any issues with the bottle leaking and it is very good quality. the bottle came with three different lids. One is just a standard lid that stays attached to the bottle when unscrewed and is stainless steel. There is a straw lid, with a silicone straw that goes into the bottle and a plastic straw on the plastic lid for drinking. The third is a plastic lid like a standard coffee thermal drinking lid. I have only used the stainless steel lid as I only use this to hold extra water to refill my other water bottle since I add a water flavor to it. All three lids have a handle source for easy carrying of the water bottle. I drop this thing all the time and it still holds up really well. Of course it is going to scratch or dent when you drop it, it isn't a magic water bottle. But it has not affected the lids or seals in any way. I like to put stickers on my metal water bottles anyways, so nothing a fun sticker cant cover up! I do not put hot liquids in this water bottle, so I cannot speak to how well it keeps liquids hot, but it keeps my water nice and cold so I wouldn't have any doubt in its ability to keep liquids warm for as long as it says. I would purchase more of this product in the future if I needed.
D**N
Great Product for the price!!
I have now owned this Iron Flask for approximately 5 years!! It has a few dents and scratches from dropping it so many times. It stays cold for more than 24 hours and maintains ice for 2.5 days.... I truly love this product!
T**K
Love it! Too big!
I really love this Iron Flask. It keeps my water cold for hours, the colors are beautiful, and the overall quality feels durable and well made. The only downside for me is the size. The 64 oz bottle is much larger than I expected, so it’s not something I enjoy carrying around every day. I originally bought it for track, and it was perfect for that since I didn’t have to refill it often. For everyday use, though, it’s just more water bottle than I need. Overall, I’m very happy with the quality and performance. If you’re looking for a large insulated bottle for sports, outdoor activities, or long days away from a refill station, this is a great choice. I just realized I personally needed a smaller size.
J**.
Great water bottle!
Leak proof, great size, looks stylish, keeps water cold, very durable!
M**G
Recommend
This is the 2nd time purchasing this product. After 2 years I lost the 1st one but can tell you this product is extremely well-made, keeps ice overnight and liquids nice and cold. Never chipped, color never faded, and the cap and straws remained intact. Would recommend to all.
D**S
The best review ever.
tldr; I've had it for one day, seems pretty good, I support it, if that counts for anything. If you have doubts, take a look at the Aquatix Fliptop mentioned below as it's a great bottle. I'll update this review if anything happens (leaking with a seal in place, container doesn't maintain temperatures, etc.). Update, 3/19/20: I filled my 40oz. Iron Flask with 10 cubes of ice and cold water; the 32 oz. Aquatix with 6 cubes and cold water. I figured the 8 oz difference warranted more ice for the Iron Flask. It's been 3 hours, and the Iron Flask's ice is all melted, but the Aquatix is still going super strong, all six cubes are there, albeit 1/2 - 3/4 the original size. If you're looking for something to keep your drinks cold, the Aquatix is the way to go. But I'm sure both bottles have their merits to each individual person. To begin, I use an "Aquatix Fliptop double insulated vacuum sealed 32 oz." So why'd I buy this? I live in a pretentious town that thinks its amazing, but the drinking water served everywhere is pretty terrible without a filter. That's just America these days, and if you disagree, just give it time to reach you, or maybe you're already acclimated to terrible water and can't differentiate anymore. I go to the gym, smoke a few j's with friends and hike, I walk 4+ mi's and run 3+ mi's every day, not including sprints. I partake in archery, rock-climbing, and bowling; I'm active AF. So, I thought, if I'm gonna want decent drinking water throughout the day, then I'll need another bottle. I also thought that instead of spending $100 on White Russians during my bowling leagues, I could just buy the $30 supplies, mix it, and keep it in this BLUE 40 oz thermos. I think 16 oz. would suffice, but better safe than sorry. I checked google for the best drinking bottles; then correlated it with Amazons selection. Thus, here we are with Iron Flask. SO first things first: TEST FOR LEAKS. I'm only going to be using the straw lid, so I tested it out-- there's many notorious reviews commenting on it. I didn't experience any leaks with that lid. I'm assuming the leaks are probably because these people lost the rubber seal that goes inside the lid, along the rim; or maybe the flip top isn't closed completely. Secondly, it's pretty easy to handwash. I just put a little soap in, hot water, and shake it for a few minutes like I'm mixing a cocktail. Could it be easier? Yeah, it'd be nice to throw this into the dishwasher. We can build spaceships, sell $200 phones for $1600, quarantine an entire country because the healthcare system is a joke-- so I dream one day we can make these bottles dishwasher safe. Lastly, the styling is amazing. I got the 40 oz "Dark Night" variant, but if this holds out for a few months (if not years), then I can absolutely see grabbing the "Dark Rainbow," and "Lime," variants too. They all seem to look nice though. So what's wrong? They give you an extra straw, three lids, BUT NO REPLACEMENT SEALS. My Aquatix came with a replacement seal, which I actually needed as I noticed it was leaking, and found the seal to be gone. Busted out the replacement and its been going strong for almost a year since. You don't know what you got 'til it's gone, and I promise, a replacement seal is very welcome. Hopefully this review helped, it's a great container. If you have any doubts, I can swear by the AQUATIX I previously mentioned: it's been solid, dropped dozens of times, still going strong. The best part is that I can put 4-8 ice cubes in it, cold water, and go throughout the day, 6-8 hours, and have it be as chilled as it was when I filled it. I've filled it with ice and water before bed, and woken up to the same ice cubes floating around. I capitalized AQUATIX so you know this last paragraph is in regards to the AQUATIX.
G**Y
Perfect size, perfect temp, perfect bottle.
I love it. I take it hiking, and either loop a strap through the handle or just carry it. Water from the fridge stays fridge-temperature without ice all day long. It's not too big but still holds plenty. I would buy it again.
M**E
Perfect Water Bottle
After my old water bottle started chipping and showing its age, I knew it was time for a replacement. I had been a loyal Zulu user for years in both 24 oz and 40 oz sizes, but when my most recent one began peeling, leaking, and shedding residue from the spout (despite regular cleaning), I decided to explore other options. I’m genuinely glad I did—because the IRON °FLASK 64 oz has been a fantastic upgrade. ⸻ What I Was Looking For With so many bottles on the market, I narrowed my search to a few non-negotiables: • At least 40 oz capacity (64 oz preferred) • Stainless steel construction • A spout-style lid (no straw) with a secure closure • A strong, comfortable handle for carrying • A proven track record with a minimum of 20K+ reviews and 4+ stars IRON °FLASK checked every box with ease. ⸻ Design & Build Quality This bottle feels solid, durable, and very well made. The stainless steel construction gives it a premium feel, and the wide mouth makes filling, adding ice, and cleaning simple. The spout lid is exactly what I wanted—secure, easy to use, and no straw to deal with. ⸻ Capacity & Performance The 64 oz size is perfect for all-day hydration. It keeps drinks cold for hours and eliminates the need for constant refills, whether I’m at home, working out, or on the go. ⸻ Ease of Use The handle is sturdy and comfortable, even when the bottle is full. The lid closes securely, giving me confidence that it won’t leak in a bag or during transport. ⸻ Pros • Large 64 oz capacity for all-day hydration • Durable stainless steel construction • Spout lid with secure closure (no straw) • Comfortable, sturdy carrying handle • Wide mouth for easy filling and cleaning • Excellent reviews and outstanding value for the price Cons • Large size may not fit standard cup holders (expected for a 64 oz bottle) ⸻ Final Thoughts The IRON °FLASK completely exceeded my expectations. It delivers on quality, durability, and functionality at a price that’s hard to beat. If you’re looking for a reliable, high-capacity stainless steel water bottle with a spout lid, this one is an easy, confident recommendation.
O**Z
f/p
düzenli su tüketen, su alışkanlığı kazanmak isteyen kişiler için en uygun ürünlerden,asla pişman olmazsınız. Termos özelliği de gayet iyi
A**R
Outstanding iron flask 40 oz stainless steel water bottle!
This is a must buy water bottle I'd highly recommend it in my opinion I've used it now more than over a year and it has been wonderful put a bunch of ice cubes in it and keeps my water or any liquids in it cold for a good amount of time couple hours or more depending upon how much ice you put in it. I love the black colored marble look. 40 oz is a good size that holds a lot of water used it for playing basketball and other sports and exercise. It got hit by the ball one time and fell over on the concrete and it only minorly scratched it seen in the picture not too bad overall strong durable stainless steel water bottle easy to clean and dry and I love the different head attachments that come with it for whatever meets your preference. I use the twist open top that's my personal favorite one that I always use. I imagine this water bottle will last me years before having to ever purchase another one maybe forever but going from plastic to stainless steel is a must I had enough of plastic ones doesn't keep your water cold is toxic with BPA chemicals and isn't good for your health glad I finally made the switch over to stainless steel and will never go back. Also doesn't leave strange after smells like the plastic water bottles would.
C**D
Lovely bottle
Absolutely love this bottle. Durable, easy to use, no scent. Good quality. Does not leak, seals very well. Keeps water cold for hours sometimes days depending on if frozen
D**H
Richtig gute....
Kanne. Halt sehr lange heiß bis warm. Und ist zudem auch noch robust und lässt sich leicht reinigen. Es sind drei verschiedene Verschlüsse bei, der eine ist einfach nur ein Drehverschluss mit einem Ring den man an der Kanne befestigen kann damit der Deckel nicht runterfällt oder verloren geht. Der andere ist so ein breiter fester einklappbarer trink saug halm, sieht ausgeklappt etwas aus wie bei den Schnabeltassen von damals, auf der Unterseite ist ein Kunststoff Strohhalm den man auswechseln kann, was ganz einfach geht, ein Ersatz Halm ist dabei. Eingeklappt ist es auch dicht, es läuft nichts aus, schon paarmal benutzt. Der andere Verschluss ist so ähnlich wie bei diesen Coffee to Go plastik Bechern deckeln. Und auch ein Klappverschluss dabei der dicht hält. Hab ich bisher nur einmal probiert weil mir diese Art des Trinkens nicht gefällt. Alles in allem bin ich sehr zufrieden mit der Kanne und bereue den Kauf nicht.
M**O
Excelente producto
Esta excelente, mantiene el agua fria, los hielos tardan en deshacerse ,lo recomiendo, no he checado con agua caliente su duracion , pero si lo recomiendo para agua fria
Trustpilot
4 days ago
1 month ago