MyBandAtacama Ultra Hydration Soft Flask - Running Water Bottle - 750ml/25oz Capacity - Leak Proof Collapsible Bottles – Food Grade TPU Material - Wide Cap Opening & Straw Cleaner - Pack of 2

This is the second collapsible bottle purchase for me since the first from another manufacturer leaked in short order. I will use this mainly for backpacking and in my sling bag that goes with me everywhere.It doesn't leak and they provide a patch if I accidently spring a leak in the bottle. The valves are unique in that they use two different methods for stopping the flow of water. I read one review that said they couldn't get their valve to work properly. Both the straw and bottle top use the same type of double valve. Before the water will flow you need to slide the black part of the valve up. This is the first method used to stop water flow and the second is with the bite value. Super easy to use and the water flow is more than adequate. I saw another review that said it was hard to bite the valve. Maybe they didn't have the black part pulled completely out. I can't imagine it being any easier than it is. It's a very well designed valve that just takes a little know-how to make it work properly. I think if they included a little instruction card in the box on how the valve works then I think the would have received nothing but five star reviews.I couldn't detect any bad taste as one other review mentioned and the water tastes great. No smells are noticable either The bottle fits perfectly in the pouch mounted in my backpack as seen in one of my pics. The straw is easily adjusted to the height that I need and doesn't leak with the included straw sleeve. The angle of the straw can be changed easily as well.The bottle compacts down to a very small size while appearing to be very durable. The straw cleaner is long enough to fully clean the straw. I will update if anything changes but right now I'm very impressed with the really well thought-out collapsible bottle.

Finally a soft water bottle that’s 750ml! This fits perfectly in the front pouch of my hydration backpack and is actually leakproof. So many bottles say they are and I’m always disappointed. The video instructions were super helpful, too. Love that there‘s two different ways to use it. I use the straw lid when I’m hiking, and the other lid when I’m playing tennis (it also fits way better in my tennis bag and collapses down when I’m done- way better than my bulky water bottle). I highly recommend this.

Have used these for Massanutten 100 and a UTMB 100K in Spain after extensive testing in training. They are perfect. The extra 5 oz versus all of the other brands is simply huge. You have to be mindful to screw it on flat from the start, but if I do there are zero leaks. LOVE the clear plastic cover for the spout, not only for hygiene, but I can loop that around my pinkie when it is off so that I can pour my electrolyte mix into the bottle and not lose the top. The opening IS wide enough to do that, at least with Roctane mix and Naak, though I would be fine if it were a few mm wider still) I did buy some velcro straps on Amazon to stabilize the top of them, as they do go a bit too high for both my Nathan and UD Hydration packs; and this has been a perfect solution and keeps them so stable. (Envisioned re-usable cinch straps, 1.5" X 12" work for me and prevent any bounce at all) These don't even leak when the spout is pulled up, so it's nice to not have to keep pushing it back down and to have another layer of security. Just don't pull up on it too hard, can pop out but don't worry, you can get it back in. Zero cons to this product. It's truly crazy that all the big hydration and trail running companies have nothing to compete with this gem! Will buy more soon.

I really like this bottle. I have a number of different water bottles that I use mainly for trail running and this bottle is at the top. I’ve struggled with finding bottles that are soft (bottle bottle style) and also carry a good amount of liquid for longer runs. This bottle has fixed that problem for me.Most soft bottles max out at 500ml, and this one carries 750ml. I have other bottles that carry just as much, but they are a hard bottle style and can cause hot spots on my skin due to them rubbing when they are in my running vest. This bottle also comes with two different drinking lids, with one having a straw that is adjustable up and down to help find that sweet spot that allows you hydrate on the move without having to remove it from your vest.The bottle itself seems to be made of a soft durable material that will withstand normal abuse that goes hand in hand with hiking and trail running. I also enjoy the shape of this bottle (cylinder) which allows you to carry it in your hand if you choose to, this is something you don’t get with most soft bottles that are flat most of the time.I’m really stoked to add this bottle to my bag and I’ll be sure to have it with me during all my long runs and my next ultra race.

First off the bottle does exactly what you want it to do, especially if you are midpack runner and not worried about having the “absolute fastest best.” Bottles have a wide mouth for easy filling, they don’t leak, and are tough. The cap for each bottle is useless unless you are throwing it in the back of your vest for longer unsupported runs. The bite valves aren’t super high flow either. But for the cost, they do exactly what you need them to do.

This was a last minute purchase as I needed the best possible amount of water in a soft flask, for the Barkley Fall Classic 50K. At 25 oz each flask I felt more confident planning for enough water in between aid stations. That was the first check mark for me. The flasks fit very comfortably, into my Ultimate Direction Race Vesta and no fuss to pull in and out. I didn't use the longer straw option although it would have been equally as efficient I am sure. The taste was "tasteless" which is always good with these kinds of flasks, and the durability was impressive. Due to the nature of this race, these flasks went through the wringer, as shown in the pic! They did not puncture or break despite my falling "on" them a couple times. I highly recommend them and I will be using them for my 100 miler in November as well.