The Orange Mud UltraFlask 600ml is a collapsible soft flask built for athletes who demand lightweight, low-profile hydration on the trail, bike, or hiking path. At just 1.5 oz (43 g), it conforms to your body as it empties, reducing slosh and keeping you moving efficiently. Constructed from high-density polyethylene and thermoplastic polyurethane, it is BPA and PVC free, dishwasher safe, and sized to slip into vest or pack pockets with ease.
Key features of Orange Mud - UltraFlask 600ml Soft Flask (20 oz) include:
• Capacity: 600ml with a 42mm wide-mouth sport cap for fast fills
• Includes a 4" hose with bite valve — removable for direct drinking
• Collapses as you drink to minimize movement and noise
• Compatible with warm water up to 140°F/60°C and freezer storage
• Sold as a single flask; suitable as a replacement or to customize a hydration setup
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
What materials is the UltraFlask made from?
It is constructed from high-density polyethylene and thermoplastic polyurethane, and is free of both BPA and PVC.
Can I use this flask with hot or frozen liquids?
Yes — it is rated for warm water up to 140°F (60°C) and is also freezer-compatible.
How do the drinking options work?
The flask ships with a 4" hose and bite valve for quick sips on the go. Remove the hose and you can drink directly from the 42mm sport cap.
How does the anti-slosh design function?
The body-conforming material compresses with each sip, so liquid volume — and therefore movement inside the flask — decreases as you drink, keeping noise and bounce to a minimum.
Is the UltraFlask easy to clean?
Yes, it is dishwasher safe, and the wide-mouth opening allows straightforward manual cleaning as well.
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DESCRIPTION
The Orange Mud UltraFlask 600ml is a collapsible soft flask built for athletes who demand lightweight, low-profile hydration on the trail, bike, or hiking path. At just 1.5 oz (43 g), it conforms to your body as it empties, reducing slosh and keeping you moving efficiently. Constructed from high-density polyethylene and thermoplastic polyurethane, it is BPA and PVC free, dishwasher safe, and sized to slip into vest or pack pockets with ease.
Key features of Orange Mud - UltraFlask 600ml Soft Flask (20 oz) include:
• Capacity: 600ml with a 42mm wide-mouth sport cap for fast fills
• Includes a 4" hose with bite valve — removable for direct drinking
• Collapses as you drink to minimize movement and noise
• Compatible with warm water up to 140°F/60°C and freezer storage
• Sold as a single flask; suitable as a replacement or to customize a hydration setup
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
FAQ
What materials is the UltraFlask made from?
It is constructed from high-density polyethylene and thermoplastic polyurethane, and is free of both BPA and PVC.
Can I use this flask with hot or frozen liquids?
Yes — it is rated for warm water up to 140°F (60°C) and is also freezer-compatible.
How do the drinking options work?
The flask ships with a 4" hose and bite valve for quick sips on the go. Remove the hose and you can drink directly from the 42mm sport cap.
How does the anti-slosh design function?
The body-conforming material compresses with each sip, so liquid volume — and therefore movement inside the flask — decreases as you drink, keeping noise and bounce to a minimum.
Is the UltraFlask easy to clean?
Yes, it is dishwasher safe, and the wide-mouth opening allows straightforward manual cleaning as well.
No FAQs match your search.
EARN REWARDS
All purchases accumulate points which be can used to redeem for discounts on all items in our rewards collection. Enroll or view your current rewards balance here.
Earn 40 points for every $1 spent equaling 5% cash back
Recommended Thickness
6mm:
General-purpose for home fitness
8mm:
Home + light commercial use. Suitable for functional trainers, squat racks, treadmills
9mm:
Popular in commercial gyms, ideal for CrossFit & heavier dropsMost Popular
12mm:
Heavy-duty, great for Olympic lifting zones
18mm:
Industrial strength, used for powerlifting & stables
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Reviews by Living.Fit Customers
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Purchasing the Bands through the website we smooth, communication from the company as to the status of my order was timely (I very much appreciated it:) and the Bands arrived in the expected time frame.
Leee
Impeccable product, survives anything you can throw at them.
20 oz is the ideal size, and I love the wide-mouth opening for filling it with powders.
Collapses as the flask empties forcing more out; no need to invert it.
5 stars: 9 (90%)
4 stars: 1 (10%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)
S
Sebastian Smith
Solid
Holds lots of liquid, collapses as the flask empties forcing more out; no need to invert it like a hard side bottle.
N
Nicolas
Years of OCR/trail running, still using them
Impeccable product, survives anything you can throw at them. I have been using the same soft flasks for over 2 years through 10+ Spartan races.
C
Cynthiahompson
Ultraflask good
I like the ultraflask. I'm just getting into running long distances. The ultraflask works very well and is quite easy to use. Also very well made.
T
Thomas Miller
Same flask, best price
I have three flasks from different sources. With the added straw, at the lowest price — best value.
E
Edward Drebes
It works
It took a couple runs to get used to it. Now I can use it with no problems.
R
Reed Perkins
Pretty Awesome
I've never used an ultraflask before, but purchased two to go with a new OM Gear Vest Pro. They collapse as I drink from them, which really minimizes the amount of air coming through the straw.
A
AARON NEUMANN
Perfect Fit
20 oz is the ideal size, and I love the wide-mouth opening for filling it with powders.
C
Charles Estep
Perfect water soft flask
This is basically all I use on long runs and on my biking. I have three of them right now.
T
Tony
It's like a silicone breast implant for your water
Hands down the best! As a professional dog trainer, I always need water and fresh cool water at that. Orange Mud nailed it with this.
J
JESSICA GROVE
Love it
Just ordered my 3rd one.
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