TRIWONDER TPU Soft Folding Water Bottles BPA-Free Collapsible Flask for Hydration Pack – Ideal for Running Hiking Cycling Climbing (250ml/8.45oz – Pack of 2)
$16.99
Price: $10.99 - $16.99
(as of Dec 03, 2025 13:40:29 UTC – Details)
Product description
TRIWONDER Soft Flask
The soft bite valve provides a higher flow rate for easy drinking and a gentle bite.
It is foldable and easy to carry, fitting perfectly into your running belt or even your pants or jacket pocket.
Ideal for camping, mountaineering, hiking, cycling, running, jogging, gym workouts, summer camp trips, and other outdoor activities.
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.
HYDRATION EQUIPMENT EQUIPPED
Material
TPU + Silicone
Material
TPU + Silicone + ABS
Material
TPU + Silicone
Volume
250ml/500ml
Volume
350ml/600ml
Volume
450ml
Weight
27g/33g
Weight
53g/58g
Weight
36g
You can take it with you anywhere, very convenient.
DETAILS 
Silicone bite valve for easy drinking.
Soft material that can be compactly folded.
Detachable nozzle for easy cleaning.
High-flow bite valve with automatic sealing, no leakage.
Running Water Bottle 
Collapsible Water Bottles 
Soft Flask 
Foldable Water Bottle
MORE HYDRATION PACK STYLES
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Customer Reviews
4.4 out of 5 stars 6,471
4.4 out of 5 stars 6,471
4.4 out of 5 stars 6,471
4.4 out of 5 stars 997
4.5 out of 5 stars 848
4.2 out of 5 stars 5,083
4.2 out of 5 stars 1,820
Price
$35.99$35.99
$29.99$29.99
$19.99$19.99
$29.99$29.99
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$17.99$17.99
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Material
Nylon Elastic Fabric
Nylon elastic fabric
Nylon + Polyester
Polyester
78%Coolmax, 18%Nylon, 4%Lycra
TPU
TPU
Size ( L x H )
15.35 x 16.14 in
11.02 x 16.93 in
13.8 x 15.8 in
15.7 x 15.7 in
S/M/L
3.15 x 9.68 in
7.1 x 15.4 in
Net Weight
250g
190g
130g
115g
30g
33g
180g
Recommended Bust
31.5in-47.2 in / 80cm-120cm
26.8in-51 in / 68cm-130cm
30.7in-43.3 in / 78cm-110cm
35.4in-45.3in / 90cm-115cm
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Compatible Phone Size
5.5 inches
5.5 inches
5.5 inches
6.8 inches
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Compatible Hydration Size
350ml Bottle / 2L Bladder
600ml Bottle / 1.5L Bladder
250ml Bottle
500ml Bottle
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Capacity
5.5L（6 pockets）
5L（8 pockets）
2.5L (4 pockets)
2.5L（7 pockets）
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250ml/450ml/500ml
1.5L/2L/3L
Color
Blue, Grey, Rose Red
Black, Blue
Blue, Green, Grey, Rose Red
Black, Blue, Red
Black, Blue, Green, Purple
Blue, Grey
Blue, Green
Adjustable
✔
✔
✔
✔
✘
✘
✘
Breathable
✔
✔
✔
✔
✔
✘
✘
Safety Promise: Made of Food-Grade TPU material, 100% BPA & PVC Free, the soft water bottle is tasteless and eco-friendly.
Space Saving: The soft water flask is compact and built for a long life for durable use. The running flask stands upright when it full and shrinks in the min volume while empty, no burden for sports.
Easy Drink: Light squeeze gives ample hydration, high-flow bite valve auto-seals after each sip, without leaking. Convenient collapsible water bottle for daily, travel or outdoor sports.
Practical: The folding water bottle with straw/nozzle can be frozen and chilled overnight, easily get a refreshing beverage on the hot day. ( Recommended used temperature: 0 – 40 ℃ )
Easy Carrying: Ultra-light hand water bottle is easy to fold and carry. It can fit easily in most hydration vest, belt or pack pockets. Great soft hydration flask for men, women and kids.
Mileika Miki –
Great find and addition to run gear
Received as advertised. Extremely helpful during my race so I didn’t need to bend down to drink or have to pull it out from a pocket. I didn’t realize that it had a open and close feature so it wouldnt leak just in case the mouthpiece pinched. It wasn’t expensive and absolutely worth the price for two! Great investment and fit a 500mL soft bottle perfectly. Extremely light weight, easy to clean, and design is perfect to adjust to where you need it.
CMac –
Nice little flask for a run!
I like a lot of the features of the handheld. I got it for trail running. Particularly training runs and cooler weather races when I won’t need as much water.My initial impressions are as follows:-I like the hand strap and it’s ability to tighten, as well as the reflective strips. I HATE carrying things with my hands while running, so the strap is a winner!-The bite valve is easy to use, and 500ml size is perfect.-I got it because it seems like you can fit keys, phone, and other stuff in the pocket, but it’s really not that big. I think you’ll be hard pressed to find a 5.5 inch phone these days, and if you do, good luck squeezing it in, especially when the water flask is full. I managed to get in a clif bar, hammer gel, and electrolyte packet. I could also fit my key fob.Overall, there are improvements I would like to see, but it’s worth the $18.99.
Jacob King –
Great Handheld for the Price
This is a really good handheld – pros: price, most comparable big brand items I shopped around same time were crazy expensive. Nozzle – love the release mechanism, it’s similar to a hydration pack for trail running – bite down, water comes out. Durability – I have put at least 75-100 miles on this item and no issues with leaking yet. I haven’t tried it but I also imagine you could put the flask in a flip belt or similar since it comes out (and soft flasks are also crazy expensive, so worth it for the price there). Cons – the zipper design could use some work. I like that it feels robust but it sits right where my knuckle is when holding and it has caused some chafing. But for $18 in 2025 I’ll deal with it. The tightening system is also a bit odd and takes some getting used to but it holds so far and again, for the price I’ll take it. It’s easy to clean, it’s a decent size for a 5-10 mile run or as your sports drink on a longer run with a water pack. It doesn’t keep things cold well but that’s not an advertised benefit. Highly recommend for the price!
Ashley S –
Runners/hikers friend
My wife and I both use these when we’re running for our water if we’re doing a short run instead of bringing the big bladder in our running vests and these things have been an absolute lifesaver to take even just one for a couple sips of water or some electrolytes but we absolutely love them they don’t leak and we’ve actually used them for our dogs as well when we go hiking and we’ve used them hiking as well not just for running so they’re super useful
Will –
Work great on my wife’s marathon.
This did exactly like it hoped it would it was a good when my wife runs her marathons.
S –
Not great
These bottles were super leaky and were such a bust, totally not worth it and I wish I could get my money back.
LifeInTahoe –
Work but not great with a running vest
The bottles are fine, but the solid top portion and wide mouth cause a few problems with a running vest.First, the small cord that most vests have to secure the bottle top won’t go around the lid.Second, and the issue that makes them really unusable for me with a vest is that the hard top of the bottle presses on my chest and any bouncing causes the hard top to bounce against my chest, causing it to get sore.The bottles with the smaller cap, and smaller hard top section, don’t have the same problems.
Tara –
Nice to have
Nice product, good quality and affordable
Jimmy –
Vreselijke chemische smaak die je er moeilijk uit krijgt.
Bobby –
Très bien aucune fuite et aucune odeur de plastique
Deenguy –
I recently got the TRIWONDER Soft Flask Collapsible unhinged Water Bottle for my outdoor activities, and I’m really impressed with its performance. This 500ml flask is perfect for running, cycling, hiking, and other activities where staying hydrated is crucial.The most standout feature is its collapsible design. Unlike traditional water bottles, this flask shrinks down as you drink, making it incredibly compact and lightweight. When it’s not in use, it takes up hardly any space in my hydration pack, which is a huge advantage on long hikes or runs.The material feels durable yet soft, and it’s easy to squeeze, allowing for quick access to water without the need for twisting off caps. The Lake Blue color is vibrant and attractive, adding a bit of style to your gear. It also doesn’t leak, even when squeezed hard, which is essential when you’re on the move.One thing to note is that the 500ml size is just right for short to medium-length activities. If you need more hydration for longer trips, you may want to opt for a larger size.Overall, the TRIWONDER Soft Flask is a fantastic product for anyone who needs a reliable and space-saving hydration solution. It’s lightweight, easy to use, and built to last – highly recommended for runners, cyclists, and hikers alike!
Eimear –
I have been using these for years now. Never leaked, i keep them in the freeze between uses & there is no taste or smell from them. They are so convenient, i have used them in my hydration pack, waste belt & also put one in my running shorts pocket, for short warm runs. The fact they roll up when empty is good for longer runs, better than hard bottles.
Adrien dethier –
C’est parfait, complément dans mes attentes.