






💧 Hydrate like a boss—24 hours cold, 12 hours hot, zero compromises.
This 3.8L Iron Flask stainless steel water bottle features double-wall vacuum insulation to keep beverages cold for 24 hours and hot for 12 hours. It includes two leak-proof lids—a patent-pending straw lid with dual straws and a spout lid—crafted from durable, BPA-free 18/8 stainless steel with a powder-coated finish and laser-engraved branding. Ideal for sports, gym, travel, and everyday use, it combines large capacity with sleek, sweat-free design.







| ASIN | B09GKPWBWJ |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Base Diameter | 6.3 Inches |
| Best Sellers Rank | 407,044 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 1,237 in Insulated Bottles |
| Brand | IRON °FLASK |
| Brand Name | IRON °FLASK |
| Cap Type | Straw Cap |
| Capacity | 3.63 kg |
| Colour | Day & Night |
| Customer Reviews | 4.7 out of 5 stars 1,768 Reviews |
| Global Trade Identification Number | 00810082481211 |
| Included Components | 2 leak-proof lids and a spout cap |
| Is Oven Safe | No |
| Is the item dishwasher safe? | No |
| Is the item microwaveable? | No |
| Item Dimensions W x H | 16.3W x 42.7H centimetres |
| Item Type Name | flask |
| Item Weight | 1.41 kg |
| Manufacturer | IRON °FLASK |
| Material Type | Stainless Steel |
| Model Name | IRON °FLASK Sport-Wasserflasche |
| Number of Items | 1 |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Recommended Uses For Product | Hot and Cold Drinks |
| Recommended uses for product | Hot and Cold Drinks |
| Special Features | Durable |
| Special feature | Durable |
| Theme | Sport |
| UPC | 810082481211 |
| Unit Count | 1.0 count |
| With Lid | Yes |
H**?
Big Bottle, Big Impression!
This thing is seriously cool in my opinion! I got the 3.785L, it's huge! It keeps the water cold for a long time. The design is great, as is the quality. I love that it comes with two different lids! Really impressed overall.
S**A
A great quality water flask that’s true to size
Absolutely love this bottle! Nice & big, stores a lot of water helping me maintain my water goals and has a nice sleek design.
A**S
Finished to an amazingly high standard.
I was incredibly impressed with this water bottle. The standard of manufacture really does deserve a mention because the attention to detail in every aspect of it is very high indeed. The handle is strong and sturdy but not overly so. The seals are excellent and the way the lid unscrews and clicks open when you pour is an amazing finishing touch. Very, very pleased with it and it has finally allowed me to go plastic-free for all my drinking water needs at work.
D**V
Best Water Bottle I Have Ever Bought!
Researched a lot before purchase and I did not expect the size and quality of the bottle that had arrived. The bottle is huge! One of the images had a vape liquid bottle on top to example the size of it. Easy to clean with the wide mouth on the bottle. The quality of the lid and the bottle itself is amazing, the colour is high quality with the etched design. Perfect for all day hydration and for taking it with you on a long hike etc. Will reccomend to anyone who wants the final boss of bottles!
E**6
Best thermus flask I've ever bought
I absolutely love this flask. I've been using it daily for about a year now and can happily report no real wear and tear, no fade on the paint, it still holds temperature like day 1. I've had ice and water in there and the ice remained past 36 hours! It's very light when empty but obviously at 3.8 litres its got some weight when full. All round, a great product. I highly recommend.
E**S
👍👍👍
I completely didn't need this, but when I was searching I saw this discounted to 18.99 and thought it was too good to be true. It turns out it wasn't. It's absolutely brilliant. Holds a large volume of water, doesn't leak, feels well built and puts my Yeti jug to shame. Iron flask also comes with a straw lid with 2 additional straws and a chug lid. Can't fault and recommend it to friends.
M**D
Big bottle
Big Strong Good quality Bit heavy Keeps the temperature hot for a while Doesn’t hold the temperature of the water that well wen half empty obviously Haven’t tested cold water yet Pretty good quite happy with it
M**Y
Incredible Bottle
Amazing water bottle at this price. The bottle and both lids feel sturdy and well made using quality materials. Looks incredible too. A* 👏🏻
M**İ
gayet güzel
Gayet güzel bu fiyata çok mantıklı tavsiye ederim.
N**A
Ottima qualità
Termo borraccia molto funzionale anche se davvero ingombrante, e pesante (1 gallone circa 3,785 litri). Ideale per la famiglia che magari che fa attività all aperto tutti il giorno o per sportivi che hanno necessità di idratarsi continuamente. In dotazione due tappi: uno con cannuccia richiudibile e l altro con tappo a vite per poter versare i liquidi dove vogliamo.
D**D
Monster of a jug!
I bought this for the specific purpose of having a solid reusable water jug for work, and after using it for a couple weeks now, I can say this thing is as solid as can be. I keep it my truck while working and has proven to be leak proof and durable. The drawback of it is that it is pretty heavy (stainless steel and full of water) so if you're looking for a more mobile, easy to carry for regular use I'd go with maybe a half gallon size. Personally I don't mind the weight of this at all because it sits in the middle of my truck while working. The gallon jug come with the open mouth lid that you can unscrew and drink from as well as a lid fitted with a straw and an extra straw. I use the straw lid because it's easier to pick up and drink while sitting in the truck as I get back in after a stop. Note, the straw isn't the easiest to use compared to a typical straw with it being long and in a gallon jug, but again it's perfect for me I don't mind. This is a perfect gallon jug for work that keeps my water cold all day. Put enough ice in it and it will keep the ice just fine and keep the water ice cold. At first I didn't put enough ice and it just melted. After using it a bunch of times now I added more ice and by the end of the day now there's still a big ice chunk in the jug.
A**L
Great value and product.
Great value and product.
M**E
Good quality thermos!
Bought this for my husband who farms and needed a larger thermos for ice and water. Pack this full of ice and you'll still have ice 3to4 days later! Good quality stainless thermos.
Trustpilot
1 week ago
1 month ago