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  • Twist bottle to collapse it down to one-quarter of its filled size when empty, minimizing the space it takes up in your pack
  • At 50% lighter than most hard bottles, it's a compact and convenient water bottle solution
  • Flexible walls, along with a thermoplastic urethane carry handle and grip ring create a comfortable carrying experience
  • External capacity gauge allows you to track your hydration intake or measure out the contents
  • 63mm wide-mouth screw cap makes it easy to fill
  • Rigid top and bottom keep it sturdy and easy to drink out of when expanded
  • Made of ultra-durable, abrasion-resistant thermoplastic urethane, RF-welded seams for superior durability and elasticity
  • Can be frozen or filled with hot water
  • Compatible with backcountry water filters
  • Safe and reliable, 100% BPA- and PVC-free
  • Hydrapak lifetime guarantee


View all Hydrapak Water Bottles

REI membership


Best Use Hiking
Liquid Capacity (L) 1 liters
Liquid Capacity (fl. oz.) 33.8 fluid ounces
Dimensions 4 x 8.2 inches
Water Bottle Material Soft Plastic
Material(s) Thermoplastic polyurethane
BPA Free Yes
Bottle Opening Wide
Water Bottle Cap Type Screw Cap
Collapsible Yes
Weight 3.3 ounces
Rated 4 out of 5 by from Learn to manage the 'taste' I bought this product for its convenience when I travel internationally. Space is always at a premium! For that the bottle scores a five. I, like other reviewers, experienced taste issues that I do not with my other water bottles. I have washed them extensively with soap and water. And used the cleaner tablets as directed by the manufacturer. Even so when I use tap water from the Metro Vancouver water supply there is a chlorine/fluorine or 'bleach' taste. However, when use filtered water I do not get the taste. I have conversed with Hydrapac about the situation and they do not have an answer. This material is supposedly used in domestic water supply systems thus I do not understand why the taste issue. My only other comment is these are two handler drinking devices because the bottle material is so flexible. So far I am exceptionally happy with the bottles. I recommend this product.
Date published: 2017-03-19
Rated 5 out of 5 by from Backpack even lighter! The Stash is the perfect backpacking companion! Compact, lightweight even when full (consider other plastic or metal water bottles then add water = weight). Add to this, durability and functionality and this little guy is a good friend to have whether trekking for days in the backcountry, or just out for a day hike stroll around town. Travel right, travel light!
Date published: 2017-03-27
Rated 5 out of 5 by from So convenient When I'm done drinking my water I can easily collapse it and put it away.
Date published: 2017-05-08
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