Review on Ultralight And Packable Water Bottle - Hydrapak Stow - Collapsible Squeeze Bag Pouch For Travel by Jair Baltrusch

I use this for snowboarding. Fits in my larger bib pockets and allows me to not pollute the world with more single use plastics. I've tried a similar item before but this bottle is the strongest portable/packable/foldable bottle I've found. I won't switch away from this one. It froze once at 10°F but only the mouth piece not the entire bottle. It is a diaphragm actuated valve so you do have to such the water out which I personally prefer, therefore it won't fill with air.