HydraPak Flux - Collapsible Backpacking Water Bottle (750ml, 1L, 1.5L) - BPA Free, Ultra Light, Spill-Proof Twist Cap

I've tried a few soft bottles because there's a lot of appeal for camping and traveling - lightweight and doesn't take a lot of space, and sometimes I don't want to deal a hydration bladder. They've all had issues - nalgene's would fall over due to the large wide mouth cap, platypus's were impossible to dry, and so on. Found an older model of the hydrapak flux that I loved for camping and traveling - super easy to pack, came in at least 32 oz, stood up on it's own, and was easier to clean and dry. Didn't super love the twist cap as it didn't release air so it would eventually flop over as you drank, and the mouthpiece was exposed. After the wife made me carry her double walled bottle during skiing, I bought her bottle, and I feel it's been improved in every way. It's wider so there's a more stable base, they added a flip cap, and now when you untwist, it lets air escape so the bottle will expand back to it's normal shape. They added clear plastic on the top so it's easier to see how much liquid is left, and the cap prevents leakage while still in the open twisted position. The loop is longer which makes it easier to roll up as in the pictures, but it's still kind of a pain, so I rarely do it. I'm undecided whether to just steal my wife's bottle, or buy a second one for myself. I still use hard bottles for sizes about 32 oz as I'm unsure of the sturdiness of the larger sizes, but this has become my go to whenever I want to take some water out of the house.

These worked great at universal studios. They have free ice and water fill up. They do have a slight taste like your drinking out of a garden hose. But I also used it with a nuun tablet and the taste was gone. I also really liked the valve. It was easy to use and didn't spill. The fit in my cargo shorts, and I was able to carry in my belt. Definitely would recommend these.

i've had several hydrapak products, and this one definitely lives up to the brand's quality standards. its much thicker plastic than my previous collapsible bottle that came with my katadyn filter (which this is also compatible with). this is a pro and a con for me. i appreciate the extra durability, and it's ability to stand up on it's own, but the extra bulk is felt in my hip pack... for short river hikes i really wanted something smaller and more easily crushable to fit in my little pack. like all the other hydrapak bottles and reservoir bags i've tried (and honestly pretty much all water reservoirs systems...) it does have a plasticy taste. it's not the worst, but it is noticeable. but if you want a collapsible water pack, that's just what you have to deal with. for most other hiking purposes, particularly if i'm carrying a backpack, this product is excellent! i think it will last much longer than my old .6L hydrapak that came with the befree, but im still sad they dont make these any more though.. hydrapak, if you're reading, please make a sub 1L softflask that is compatible with the katadyn befree!! thanks again for the great products!

I have a smaller Hydrapak 350ml Stow bottle that I carry on my longer runs. I decided I needed a larger size for traveling and opted for the 1l size. I chose the Flux model since it has the ability to stand upright. I've used it for a few days already and like how the drinking nozzle operates with a twist to open and lock the nozzle. No aftertaste in the water that is a common complaint in those cheaper brands. It's convenient to have bottles that can compress to a small size when empty.

used for hiking and backpacking. works well, doesn't leak.

As a UL they-hiker I was looking for an upgrade to the slow-filtering Sawyer, but needed a lightweight and reasonably durable bottle to pair with the Katadyn filter. While the Flux is heavier than a Smart water bottle, it’s worth the weight to be able to use the Katadyn filter. The bottle itself is remarkably durable (Appalachian Trail thru/hike tested), easy to fill due to its large mouth, and collapses a great deal when not full (which is great for traveling to the trail!). The sole drawback would be the plastic taste this bottle leaches into the water. At first it was bad. Like…really bad. I rinsed it, baking soda and lemon juice soaked, and finally bleach soaked it to get to a non-nauseating level of taste. Even after 4 months on the Appalachian Trail, it still has trace amounts of that delectable plastic flavor. TL;DR: it works with the Katadyn filter, but be prepared for the plastic taste to be around for quite some time.

I travel a lot for work and this has become my go to bottle. Fits a large bottle of water which is just the right amount for me on a plane. Sturdy enough to fill up in at an airport water station, but flexible enough to fit in my backpack side sleeve or more importantly the seat back pocket in the seat ahead of me. Absolutely no leaks so far which is really due to the valve that you drink out of. Super solid though sometimes harder to open the cap which covers the part that your mouth touches. Love that it rolls up small when empty and the handle is quite durable. I wish the rolled up bottle more easily tucked into the handle. It does fit the filter they sell but won’t roll up as easily with it in the bottle.

We were on a trip to Alaska and I saw this bottle in an outdoor store calling out to me. Of course I quickly looked it up on amazon and did an impulse buy thinking it would be perfect for our next trip. Unfortunately, I should have used it before our return period with amazon. I really wanted to like this, its durable, it folds up small.. Drinking from it with the spout is hard to get used to since the bottle has no form, but doable. The issue is, when you put water in it... It morphs it to something unusable. The plastic taste was so bad after only a day in the bottle that my wife spit It out after taking a swig. We dumped the water and used a different bottle. Again, I wanted to like this but will prob just go back to our vacuum sealed bottles for our next trip. I am afraid this one will just collect dust for the rest of its life. I might try some of the lemon juice tricks I have read on other reviews but honestly I feel like I shouldn't have to do so much aftermarket effort to make a drinking bottle usable.