IRON °FLASK Camping & Hiking Hydration Flask with Straw, Wide Mouth Insulated Stainless Steel Sports Water Bottle – 40 oz Midnight Black

great product
This is an amazing cooler or flask or water bottle, whatever you want to call it. It keeps your drinks cold for at least 24 hours. My wife left it in the golf cart at the course. I picked it up the next day and the ice was still solid it did not melt. Now you could buy a couple of other water bottles from some of the name brands and pay at least twice what you are paying here, but you would not be gaining anything. The only difference is that you cant put a design on this. However the colors are pretty cool. I think i would rather save a few bucks and live without the design. I love this water bottle/ flask/ or cooler. I would highly recommend this item.

Favorite bottle Ever
Got an Iron flask as a gift. Loved it so much I bought a second one. Then bought my husband one as well. The interchangeable lids are great and don’t leak. The bottle keeps hot drinks hot and cold drinks cold for a long time. (All day and then some.) I haven’t needed to replace any despite dining the edge of one, it still works perfectly.If you’re looking for a good quality water bottle this is it.

Love these!
UPDATE OCT 2025:Took 1 star away due to what I assume was a significant manufacturing change. Something has changed and my original few bottles keep the same exact drinks cold for a significantly longer period of time than the newer bottles. It took me a while to notice, but its obvious when the ice melts before I get home on days that I use certain colored bottles. There is no damage or visible defect that would explain the difference, hence my assumption that it is manufacturing changes. I’m disappointed in the change, but will continue to use the bottles I have. Just probably will not buy any more in the future. However, my original review still stands for the first few bottles that I purchased…ORIGINAL REVIEW:I never understood the Stanley craze until I started buying these bottles. I bought my first in 2022, and now I have a full on collection of them! In my defense, I take 2 with me to work daily, and sometimes need another 2 for the next shift if I’m working a double. (One is for a caffeinated cold beverage, the other is always for H2O). Having more bottles means that I can go a few more days before washing all of the used ones!First the negatives: as pretty as the “aurora” color is, it is a different texture and scuffs/scratches very easily. I have not had this problem with any of the other colors (although the rose gold is a slightly different texture as well). I have broken one carabiner clip on a straw lid, but I tend to fidget with them when stressed/bored so not unexpected. The bottom of the bottles can be a little slippery depending on the surface – I bought silicone boots to negate this.Now the positives: I like my fluids ice cold, and each of these bottles keeps my drink cold with ice frozen for about 36-48hrs depending on the outside temperature. I haven’t tried them with anything hot at this point. They never spill, as long as I actually close the lid correctly (I only use the straw lids… not the other two that each bottle comes with). I like that the straw lid folds down, which is why I don’t have more of the copilots. They are easy enough to clean with a bottle & straw brush. I do admittedly switch between them daily, but no signs of mold growth in any of them, ever. The bright beautiful colors make them stand out and prevent them from “walking away” with a coworker. They do not make noise when drinking and the separately bought silicone boots keep them silent on the deskFor reference, the attached pic is a 22oz elemental grey, 32oz blue waves, 40oz dark night & bubble gum & aurora, and then 40oz copilot in rose gold. I included a pic of a scratch on the Aurora from one single trip inside my work bag. The others make the trip daily without a single scuff.

Absolute must have
This is the absolute best water bottle I have ever bought. The BEST. I recommend it to everybody. I can leave it in a hot car all day in the middle of summer 100+ degrees and the water inside would be lukewarm at best. A regular bottle it would be hot. I used to work in a freezer/cooler in a grocery store. Left it in there all day 5+ hours lid on/sealed and the water inside from that morning was still lukewarm, the cooler hadn’t even touched it. The insulation is seriously out of this world. If you work construction or outside its a must. The water can be cold all day. It’s fantastic. Easy to clean although I would suggest washing with vinegar after because soap tends to stick and leave a taste. It’s my favorite water bottle. I 100% recommend over any other brand. Especially for the price. They could charge so much more.

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.

Big bottle to help me drink more water, it’s a good size well styled bottle,no leaks