HydraPak Stow – Collapsible Backpacking Water Bottle (350ml, 500ml, 1L) – BPA Free, Ultra Light, Spill-Proof Twist Cap
Original price was: $22.00.$16.50Current price is: $16.50.
Price: $22.00 - $16.50
(as of Nov 30, 2025 16:24:04 UTC – Details)
SKI, HIKE, BIKE & CLIMB COMPATIBLE: The Stow fits flush in ski pants and coat pockets, bike jerseys or fanny packs – flatten and roll when empty.
DURABLE & LIGHTWEIGHT: Made of abrasive-resistant TPU, the Stow can be frozen and is dishwasher safe, at under 2 oz it’s 80% lighter than most hard bottles.
POCKET SIZED: Flexible bail handle for comfortable carrying, quick attachment, and filling from a faucet, lake or river.
WATER FILTER COMPATIBLE: Attaches to most 28mm threaded water filters such as the Hydrapak 28mm filter kit.
FLIP TOP CAP: Made for drinking during activity, an easy open cap cover keeps the self-sealing silicone nozzle clean.
Keyboard Monster –
Great, flexible water bottle.
I was going on a trip and was unsure how available water would be during my adventuring, so wanted to be able to bring a liter of water if necessary, but didn’t want to always dedicate bag space to a liter bottle. This is perfect because if you put in less water, it takes up less space. And since it’s flexible, it fits in a bag much easier and also decreases in size as you drink. I also found it was great for the plane because I just kept it in my lap for easy access and it didn’t roll away. Honestly, awesome. I kind of want to get the smaller one, but probably don’t need it since I can fill the 1L up halfway. (Also, the 17 oz bottle is the same price as the 1L on here.)Mine tasted vaguely chemically at first. I washed it with dish soap and then froze it with lemon water, and it didn’t make much of a difference. There wasn’t time to try again before leaving, but over the course of my trip, the weird flavor disappeared. If the flavor had been really strong, I don’t know what I would have done.Note: I saw a comment about how gross the mouthpiece gets and was worried, but it wasn’t an issue for me. I used it for water only, and didn’t really wash it during the trip (gross, I know) because the country I was in didn’t have potable tap water. That said, after 13 days, the mouthpiece still looks clean.
Amazon Customer –
Great foldable reusable water bottle!
Great little packable bottle! I’ve been using this for three months now regularly. Zero leaks and I have not been gentle. Hiking, cycling, traveling, and everyday walking. The carrying handle loop is sturdy and feels secure. I added a small carabiner which has been extremely helpful for clipping onto bags.The bottle did smell plasticky when it first arrived. The initial washing got rid of most of the smell and after about two more uses/washes, the smell was completely gone. This bottle is super lightweight and folds up to nearly nothing, easily tucking into its own carrying loop.Refilling is easy. The bottle is not slippery at all, even when it’s wet. It doesn’t stand up on its own, but is small enough to hold with one hand and also hold the loosed cap with your other hand.When drinking out of the bottle, you have to either suck the mouthpiece like a straw or squeeze quite hard. If you opt to squeeze, be prepared for a turbo jet stream of hydration. That is the price you pay for security so the mouthpiece doesn’t leak when the cap is flipped open. Fair trade.This bottle definitely gets condensation on the outside if you fill it with cold water on a hot day, but that’s no fault of the bottle.
Anoymous –
Good but Difficult to thoroughly dry.
It’s great how collapsible this is as I took it overseas and was able to stay hydrated as I walked around. It’s a great size for fitting in the dishwasher. It’s only problem for me is it takes forever to thoroughly dry out even with putting it on a draining board for multiple days and letting it air dry because the opening is too small to stick your hand and a drying towel in to dry it (even too small for the drying towel). O
BwanaBob –
Perfect for a cargo pocket
The first thing I want to point out is that there was no odor or odd taste that came from the flask. I have other bladder style hydration devices that do impart an odd taste to water, flavored electrolyte drinks, etc., but I don’t get that from this one. Why other reviewers have reported this is beyond me.The 500ml size is perfect for slipping into a decent sized cargo pocket. I hardly noticed it against my thigh on a 6 mile hike. The flask doesn’t leak, and the air can be squeezed out as you drink from it keeping sloshing noises to a minimum if that’s important for you. The flip top cover keeps the drinking spout clean. There is a .0021 second learning curve when it comes to understanding how to drink from it. Seriously, it’s easy to drink from.As for cleaning it, I just squirted a little dishwashing liquid in it, filled it about two thirds full with warm water, capped it and shook the devil out of it a few times. I rinsed it thoroughly and let it dry on one of those wooden plastic bag dryers. Easy peasy. It could also be hung from its carabiner attachment loop. Let all the remaining water from the washing collect in the bottom, then dump that out and rehang it. Evaporation will take care of the rest.Finally, the flask didn’t retain any odor or flavor from the powdered electrolyte mix I used in it. (I’m still partial to the original sports drink, without naming a brand. I don’t know if one brand or another might impart an aftertaste to the flask or not.) And if the flask begins to leak or the bladder fails within the next year, I’ll update this review.
POLDER –
après 1 mois et demi d’utilisation intensive rando, plongée, apnée et travail, cette gourde est très résistante aux contreintes du soleil et du sel. J’avais des doutes avant l’achat sur la valve et au finale elle se révèle très pratique, on peut soit aspirer l’eau ou appuyer fortement sur la gourde pour avoir de l’eau sous pression.Le faite que l’on puisse la plier ou l’applatir sont des atouts supplémentaires.J’adore !!!!
SarahT –
I LOVE this water bottle. It smooshes into any handbag or pocket and rolls up super small when empty. Doesn’t leak. Thus far have used it walking the dog, going to work, and out sailing. My new go-to!
YURHENI TORRES –
Una excelente forma de transportar agua, no pesa ni ocupa espacio cuando no está en uso, resistente y no le da al agua mal sabor o aroma .
Aimeé García –
Sirvió para viaje pero huele un poco a plástico.
Luis Palenzuela –
Tras muchos enjuagues sigue sabiendo a plástico lo que la hace inservible