






💦 Stay hydrated, stay ahead — the bottle that folds to fit your lifestyle.
The HydraPak Stow is a BPA-free, ultralight collapsible water bottle available in 350ml, 500ml, and 1L sizes. Designed for active professionals and outdoor enthusiasts, it features a leak-proof flip-top cap with a self-sealing nozzle, abrasion-resistant TPU construction, and compatibility with 28mm water filters. Its space-saving rollable design and flexible bail handle make it perfect for travel, hiking, and everyday carry, backed by a lifetime warranty.
























| ASIN | B0CSH2KY3L |
| Additional Features | BPA-free and PVC-free materials, Carrying Loop, Collapsable, Dishwasher safe, freezer safe, warm water compatible, Durable abrasion-resistant TPU with RF-welded seams, Filter, Leak-proof flip cap with self-sealing nozzle, Ultralight construction (under 2 oz) |
| Age Range Description | Adult |
| Best Sellers Rank | #2,309 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #158 in Water Bottles |
| Bottle Type | Collapsible Water Bottle |
| Brand | HydraPak |
| Brand Name | HydraPak |
| Capacity | 12 fluid ounces |
| Color | MTN Tahoe Blue |
| Container Type | Bottle |
| Customer Reviews | 4.2 out of 5 stars 2,893 Reviews |
| Finish Types | Glossy |
| Global Trade Identification Number | 00834456003601 |
| Included Components | 1 Collapsible Bottle |
| Item Dimensions W x H | 5.1"W x 9"H |
| Item Type Name | Collapsible Water Bottle |
| Item Weight | 35 g |
| Manufacturer | HydraPak |
| Manufacturer Part Number | GS340TM |
| Manufacturer Warranty Description | Lifetime Warranty |
| Material | Polypropylene , Silicone |
| Material Type | Polypropylene, Silicone |
| Material Type Free | BPA, BPS, and PVC Free |
| Model Name | Mountain Stow |
| Model Number | GS340TM |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Care Instructions | Dishwasher Safe, Freezer Safe |
| Recommended Uses For Product | Emergency preparedness / survival kits, Everyday carry and gym use, Family outdoor adventures, camping, Festivals, concerts, events, Hiking, backpacking, climbing, Travel, commuting, TSA-friendly |
| Reusability | Reusable |
| Shape | Flat |
| Special Feature | BPA-free and PVC-free materials, Carrying Loop, Collapsable, Dishwasher safe, freezer safe, warm water compatible, Durable abrasion-resistant TPU with RF-welded seams, Filter, Leak-proof flip cap with self-sealing nozzle, Ultralight construction (under 2 oz) Special Feature BPA-free and PVC-free materials, Carrying Loop, Collapsable, Dishwasher safe, freezer safe, warm water compatible, Durable abrasion-resistant TPU with RF-welded seams, Filter, Leak-proof flip cap with self-sealing nozzle, Ultralight construction (under 2 oz) See more |
| Specific Uses For Product | Electrolytes, Water |
| Sport Type | Outdoor Activities |
| Style Name | 12oz/350ml |
| Theme | Outdoor Activities |
| UPC | 834456003601 |
| Unit Count | 1 Count |
N**R
Great for kids. smaller than the next size up
Love these Hydrapak Flasks. They're sturdy and leak free and a great value for the money. They're easy to clean after use and store nicely. Note: These do have a strong plastic taste unless cleaned properly before first use. a water, lemon juice, baking soda mixture works great to remove the plastic taste. Ensure you do this before first use with drinking water. Otherwise, this was a great product I purchased for my son to use while snowboarding at snowboard school at one of our local mountains. It fit great in his jacket and is smaller in heighth than the next size up. I add that because I had to search forevor to confirm before buying. It is in fact shorter than the 500ML version.
C**.
HydraPak Stow Collapsible Water Bottle – Perfect for Backpacking & Bear Vaults!
This HydraPak Stow Collapsible Water Bottle was a lifesaver on a recent 6-day backpacking trip on the Allegheny Trail. I used it daily for my electrolyte water and couldn’t be happier with it. Why It’s Great: Packs down super small when empty, making it easy to store in a bear vault or stuff in a pack without taking up much space. Expands to a full usable size with a secure cap and easy-to-carry handle. Clipped mine on my pack strap with a carabiner during the day. Durable and flexible material that held up well on the trail. Lightweight and convenient for multi-day trips. I’m very pleased with this purchase and got it at a great price. If you do any backpacking, hiking, or travel where space and weight matter, this collapsible bottle is an excellent choice.
L**N
Quality materials, convenient size
Great quality item that unfortunately just doesn't suit my (very specific) needs, but it seems to meet or exceeds all product specs. My favorite thing about this is shape and size. It's so convenient to have something in the same shape/size as a flask. Love that you can just shove it in a pocket. VERY lightweight. Materials feel like they are of great quality, the bottle has the flexibility/collapsibility aspect while still feeling durable. Unfortunately I do find it a little awkward to drink from due to the flexibility. I don't think this is a fault of the specific product, someone used to using collapsible water bottles may not have any issues. Personally, I would enjoy a similar bottle that's a little bit firmer in the hand, even if it meant it didn't collapse as easily (or at all!). HydraPak does have some products that function that way but I really wanted the flask-like shape and size of this one! I didn't love the cap cover, I would've preferred if it was removable. The drinking cap is pretty spill-proof so it seemed like the main purpose of the plastic cap was to keep dirt out/general sanitary reasons - which is great, but I really needed to be able to drink one-handed and it was harder than expected to flip the plastic cap open/closed without needing to get my other hand involved. I don't really see the point of the measurement markers on the side, because (unless I'm doing something terribly wrong) you can't really use this bottle if there's air inside - if you do, it's harder to drink without getting an uncomfortable gulp of air. Not really a problem but I thought it was odd. It's not easy to dry after washing since you can't really stick a towel inside to hand dry, and it takes more than a day for the inside to air dry, so I'd be a little bit worried about mold. Overall, I think it's a pretty solid collapsible water bottle and the problems I have with it are possible user error. It's well made and a pretty convenient little bottle.
B**S
Ideal for Music Festivals!
The Hydrapak Stow Collapsible Water Bottle has been a game-changer for me during music festivals. Here's why I love it: Portability: Its collapsible design makes it incredibly easy to carry around, especially when space is limited. I can simply fold it up and stash it in my bag or pocket when I'm on the move, which is essential when navigating crowded festival grounds. Lightweight: This water bottle is ultra-lightweight, so it doesn't add any unnecessary bulk to my festival essentials. I can enjoy staying hydrated without feeling weighed down by a heavy water bottle. Easy to Use: The squeeze bag pouch and easy-open cap make it a breeze to hydrate on the go. I can quickly take a sip of water between sets without missing a beat. Large Capacity: Despite its compact size when collapsed, the 1-liter capacity is perfect for ensuring I have enough water to stay hydrated throughout the day. I appreciate not having to constantly refill it, allowing me to focus on enjoying the music. Durability: The BPA-free construction is durable enough to withstand the rigors of festival life. I don't have to worry about it getting damaged or leaking in my bag, even when things get a bit chaotic. Overall, the Hydrapak Stow Collapsible Water Bottle has exceeded my expectations in terms of convenience, portability, and functionality. It's become an essential companion for me during music festivals, allowing me to stay hydrated and enjoy the experience to the fullest. If you're looking for a reliable water bottle for your next festival adventure, I highly recommend giving this one a try.
M**R
Great for skiing and climbing
Great water bottle for nearly every outdoor activity. I mainly use this for skiing and multi-pitch climbing. It’s light, durable, collapses really small when empty, and can be clipped to a harness. I carry 2 when skiing and have 32oz of water. I also feel safer skiing with these instead of a hard water bottle, like a Nalgene, in case I fall on it. Great value.
K**R
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.
M**N
Developed a small leak after three uses
After about three uses, my copy developed a tiny hole in the shoulder from which it leaked. Easy to plug with super glue but I don't really trust it now. I love the size and form factor.
T**H
Super convenient
I've been loving this hydrapak, been using it for about a year now. No leaks so far! It had a rubbery taste at first, but I washed it out with dish soap and hot water a few times, pretty thoroughly, and the weird taste has faded with time. Folds up real well and is great for air travel, hiking and skiing. Fits in the airplane seat pocket perfectly and I love being able to throw it in my backpack and jacket pockets without any issue. I actually bought a few and they made great gifts that I could fly with in my carry on. I purchased some carabeaners separately to gift with each bottle. My friend says they like to put theirs in the freezer for ice cold water! Love the squirty dispenser too - no more pouring water on my face! Just make sure to tip the water down into the cap when squeeze drinking so you don't squirt air in your mouth, it hurts!! And I like using it for cleaning when camping and need some water pressure. Knocked off a star because I find the cap difficult to put on, you have to thread it just right and the cap is not attached so it's easy to drop when filling. My friends have also complained about the rubber taste.
P**R
ultra pratique
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 !!!!
G**M
Excelente producto
Buen producto, se ve resistente.
L**A
NO PIERDE EL SABOR A PLÁSTICO
Tras muchos enjuagues sigue sabiendo a plástico lo que la hace inservible
や**け
冷凍できました。
凍らせてリュックの背面に入れることで保冷剤としても活躍しました。とっても便利です。
A**N
portatile e pratico
Provato girando in montagna, eccellente.
Trustpilot
2 weeks ago
4 days ago