Hydrapak Ultraflask Collapsible Water Bottle for Sale, Reviews, Deals and Guides

I put a pinhole leak into mine on day one, which is a bummer, but I love having a few of these around for different adventures.

I really liked the idea of packable water bottles for traveling. However, I am not sure I would use these because they are so flimsy once you start drinking and they are not full. Maybe that is the idea but I think I will still with my Hydro.

I love this product but I bought the wrong size for what I needed it for

I like that this is pocket sized and the short (6") rubber hose nozzle that comes included. I can put the flask in an inner chest pocket, where it wont freeze on winter outings (e.g. backcountry skiing, climbing, etc), and the nozzle protrudes just far enough to reach my mouth when needed (if i unzip my jacket a bit to get at it). Two points for improvement: (1) the nozzle needs a way to be sealed (picture the nob used to seal a camel back hose). Otherwise it will drip if compressed (e.g. while stored inside a loaded pack). (2) the lid would be better in a side mount rather than top mount configuration to make it less bulky when stored in a pocket (again picture a camelbak, and think of how the lid is mounted for storage in a backpack inner pocket). Basically I just want a mini camelbak that I can store in a pocket on my jacket, but this is the closest you can get.

Fun squishy design. The bottle collapses down to almost nothing when empty. The lack of a rigid structure makes drinking a little awkward as you get closer to empty.

use it in my running belt and it fits well and is a breeze to use, especially appreciated while on a grueling trail run!

Awesome lightweight bottle that collapses down to save space in your pack. I also really like the small size to stick in my coat while skiing to grab a swig of water on the lift. After its empty and collapsed you will hardly notice it is in your coat!

Got this for other consumption than water. Great light weight little flask easy storage while backpacking.,

Bought a few of the 600ml because they are great for long runs. No more being weighed down by heavy unused water bottles. Once you finished one of these just roll it up and pack it up.!