SoftFlask™ 500ml

made by HydraPak®, 42mm wide mouth, locking cap
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Made by the hydration experts HydraPak®, our SoftFlaskTM 500ml is designed to integrate seamlessly with vests and belts, as well as the drop-in side pockets on our Trail Shorts, Half Tights and Tights. Featuring a low-profile, tapered welded bottom and an easy fill 42mm wide mouth for nutrition mixing, this flask is topped off with a locking cap to prevent unwanted spillage and a handy measurement guide, just in case.

Features
  • 42mm wide mouth design with locking cap for leak-proof in/outs
  • Low-profile pinch-welded flange design for easy drop-in pocket fit
  • 500ml measurement guide 
  • BPA and PVC free
  • Top rack dishwasher safe (best to avoid high heat settings)
  • Backed by the BeyondTM Lifetime Guarantee through HydraPak®
Materials + Specs
  • Volume: 500ml (16.9oz)
  • Weight: 38g (1.34oz)
  • Materials: thermoplastic polyurethane sleeve, silicone bite valve, polyoxymethylene cap
  • Made in China
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SoftFlask™ 500ml
SoftFlask™ 500ml
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$24
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  • 5 stars: 28 (85%)
  • 4 stars: 2 (6%)
  • 3 stars: 1 (3%)
  • 2 stars: 1 (3%)
  • 1 star: 1 (3%)
T
Tyler
Wear it for: Running

SoftFlask™ 500ml

T
Ttado
Wear it for: Running
Product Fit: Spot-on
Great!!

Great!!

A
A.J.
Wear it for: Running
Product Fit: Spot-on
Works as you would expect!

Not much to a soft flask. Works as it should. Kind of a pain putting a soft flask back in the pocket but with a few more runs I think it will get easier.

J
Julie
Wear it for: Running
Product Fit: Spot-on
This flask is the perfect fit for the Janjii

This flask is the perfect fit for the Janjii running shorts ! Very comfortable for long races
Love it

J
Joel
Wear it for: Running
Product Fit: Spot-on
Great Bottle

Bought it as a backup and quickly moved into the starting rotation.

E
Egor
Wear it for: Running
Product Fit: Spot-on

Great!

M
Meghan
Wear it for: Running
so easy

everything the other positive reviews say is right. I like the shape at the top - easier to slip into my shorts pocket.

P
Pip
Wear it for: Running
Product Fit: Spot-on
Nice soft flask

Love the on/off switch for the nozzle. Saves wet story if flask gets pinched by tying your shoes.

J
John
Wear it for: Running
Ok flask

There are better fitting and locking style caps for the price on hydra flask.

K
Kelsey
Wear it for: Running, Hiking
LOVE

Love this flask, especially the closure on the mouthpiece.

J
James
Wear it for: Running, Hiking, Camping, Climbing, Mountain Biking
Product Fit: Spot-on
Great purchase

Great purchase. Bottle is light very durable and I can take it in any get or belt.

K
KellyD
Wear it for: Running
Great for use with trail tights but hard to clean valve

I love the size and ease of use while running, and I didn't know how much I would love that it locks so it won't leak. It fits in my trail tight pocket and makes it easy to bring water and snacks along when I don't need to bring my whole running vest. The flask itself has a good shape that dries out easily, but the valve is difficult to clean and I noticed mildew building up.

M
Meghan
Wear it for: Running
Love the mouthpiece

I love how you can close the mouthpiece, I can fill them up and toss them in my car without worrying about them leaking. They fit in my Salomon ADV 12 perfectly.

M
Madalyn

First time I ever used a soft flask. I liked it. This I e is easy to fill and doesn't leak

R
RUPA
Wear it for: Running
Product Fit: Spot-on

Ran Chicago Marathon couple of weeks ago and the soft flask came in handy…👍
Fit in pockets on running tights/shorts is perfect

V
Veronica
Wear it for: Running
Product Fit: Spot-on
Great!

Fits in my janji tights perfectly

a
amanda
Wear it for: Running, Hiking
Product Fit: Spot-on
Handy bottle!

Appreciate its design and utility

C
Chrissy
Wear it for: Running, Hiking
I prefer my Temu / Amazon bottles

I prefer my Temu / Amazon water bottles honestly. Especially at this price

M
Mark
Wear it for: Running
Product Fit: Spot-on
Confirmed half tight compatible

Ran my first ultra 40mi with these. Easy to take fluids, and stash in the half tights, especially when a surprise downhill rock garden greets you. When I ran a marathon, I had a lot trouble drinking on the run from a cup, but I was able to take in 4.5L over 9 hours.

M
Mary
Wear it for: Running, Hiking
Locking soft flasks: best idea ever

Amazing. Shocking it took this long for these to be a thing. With a big bladder it’s hard to know how much you’re drinking/how much you have left and you have commit to all your liquid being the same (water, lytes, etc). It’s easy to throw a few extra of these in the back of a pack and not worry about leaking. Game changer.

J
Jeana
Wear it for: Running, Hiking
Product Fit: Spot-on
Love it

My favorite thing about janji gear is all the pockets and this fits in them nicely! I fill this 500 ml and run with it in the side pocket of the trail short or tight and it’s been wonderful. Love the locking lid feature too, preventing spillage while being jostled around.

K
Karen
Wear it for: Running, Hiking
Product Fit: Spot-on
Great bottle

I prefer this bottle to the Salamon - much easier to make sure it is not leaking, with the on/off.

M
Malissa
Wear it for: Running, Hiking
Product Fit: Spot-on

I

K
Kim
Wear it for: Running
Product Fit: Spot-on
Appreciate

Perfect for longer runs

M
Megan
Wear it for: Running, Hiking, Mountain Biking
Product Fit: Spot-on
Perfect

I love the size and shape. Also, the flow lock feature is great to have.

J
J.I.

Perfect for my long run

S
Sophia
Wear it for: Running
Product Fit: Spot-on
Maybe I need a few more runs with it

I got this as a fueling option for long runs in preparation for my first marathon. At first, it weighed down my shorts a bit (the Janji trail shorts). As I continued to drink it, it got really floppy and wasn’t able to properly sit in the side pocket. I feel like I spent a lot of time readjusting it while I was trying to run. Any tips would be appreciated!

C
C.M.
Wear it for: Running
Product Fit: Spot-on
Great, but with(out) a twist

Love this, but have one thing that caught me off guard.
I have other Hydrapak soft flasks (without the locking lid) that I use in a vest, I added this one to my rotation and learned the hard way that the nipple can be pulled straight off - the others have a notch thing that requires you pull and twist in a certain way, preventing this. Not a janji issue, but caught me off guard (soaked 😆). Otherwise, great flask

J
Julie
Wear it for: Running, Hiking, Camping, Cycling
Product Fit: Spot-on
Great bottle

LOVE the locking lid. I can cram these inti the Janji belt without worrying about draining all over me. Easy to lock amd unlock while running. Cap easy to unscrew to refill. Sturdy thickness. Very happy with these!