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Orange Mud - UltraFlask 500ml Soft Flask (17 oz)

Orange Mud - UltraFlask 500ml Soft Flask (17 oz)

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$22.00 Regular price $24.95
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  • Body-Conforming Fit: The ultra-soft construction molds to your pack or belt pocket, moving naturally with your body.
  • Anti-Slosh Technology: The flask collapses as you consume liquid, reducing movement and keeping you stable on the go.
  • Secure Bite Valve: A 42 mm sport cap paired with a silicone bite valve and locking tab gives you precise, leak-resistant flow control.
  • BPA & PVC Free Materials: Built from 0.25 mm TPU and HDPE, it handles freezing temperatures and warm liquids up to 140°F / 60°C.
  • Lightweight Capacity: At 500 ml / 17 oz with a weight of approximately 1.4 oz (40 g), it suits long runs, ultras, hikes, and other endurance pursuits.

The Orange Mud UltraFlask is a 500 ml soft flask engineered for runners and endurance athletes who need reliable hydration without added bulk. Its flexible TPU and HDPE construction collapses as you drink, eliminating slosh while staying feather-light at around 1.4 oz. Whether you're tackling a trail ultra or a long hike, this flask is built to keep up.

Key features of Orange Mud - UltraFlask 500ml Soft Flask (17 oz) include:
• 500 ml / 17 oz capacity at approximately 1.4 oz (40 g) total weight
• Collapses progressively as fluid is consumed to minimize sloshing
• 42 mm sport cap with silicone bite valve and locking tab for controlled flow
• Made from 0.25 mm TPU and HDPE — 100% BPA and PVC free
• Compatible with freezing and warm liquids up to 140°F / 60°C

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.

Q: What is the capacity of this flask?
A: It holds 500 ml / 17 oz of liquid.

Q: How much does the UltraFlask weigh?
A: It weighs approximately 1.4 oz (40 g).

Q: Can I use this flask with hot or frozen liquids?
A: Yes — it can be frozen or filled with warm water up to 140°F / 60°C.

Q: Is this flask free of BPA and PVC?
A: It is constructed from 0.25 mm TPU and HDPE and is 100% BPA and PVC free.

Q: How does the locking bite valve work?
A: A silicone bite valve paired with a locking tab on the 42 mm sport cap allows you to open and close the flow securely, preventing accidental leaks.

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

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DESCRIPTION

The Orange Mud UltraFlask is a 500 ml soft flask engineered for runners and endurance athletes who need reliable hydration without added bulk. Its flexible TPU and HDPE construction collapses as you drink, eliminating slosh while staying feather-light at around 1.4 oz. Whether you're tackling a trail ultra or a long hike, this flask is built to keep up.

Key features of Orange Mud - UltraFlask 500ml Soft Flask (17 oz) include:
• 500 ml / 17 oz capacity at approximately 1.4 oz (40 g) total weight
• Collapses progressively as fluid is consumed to minimize sloshing
• 42 mm sport cap with silicone bite valve and locking tab for controlled flow
• Made from 0.25 mm TPU and HDPE — 100% BPA and PVC free
• Compatible with freezing and warm liquids up to 140°F / 60°C

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

Q: What is the capacity of this flask?
A: It holds 500 ml / 17 oz of liquid.

Q: How much does the UltraFlask weigh?
A: It weighs approximately 1.4 oz (40 g).

Q: Can I use this flask with hot or frozen liquids?
A: Yes — it can be frozen or filled with warm water up to 140°F / 60°C.

Q: Is this flask free of BPA and PVC?
A: It is constructed from 0.25 mm TPU and HDPE and is 100% BPA and PVC free.

Q: How does the locking bite valve work?
A: A silicone bite valve paired with a locking tab on the 42 mm sport cap allows you to open and close the flow securely, preventing accidental leaks.

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

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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

Customers praised this soft flask for running, saying it "works excellent" for long runs and electrolytes. The collapsible design eliminates sloshing and saves space when empty. Easy to use and pack, though customers note it requires diligent cleaning. Perfect 500ml size for hydration during endurance activities.

Water (positive)Size (positive)Running (positive)Flask (positive)Bottle (positive)
  • 5 stars: 10 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Alainruong
Works exactly as advertised

These flexible water bottles are easy to fill and stay snugged on the running body strap. Highly recommended.

S
Stephani Hunsinger
Great water bottle for running!

Water bottle collapses on itself as water is sucked out so no sloshing around while running. Perfect size for adding electrolytes.

K
Kathleen Pallardy
Best Flask out there!!

Love these flasks! Used them for the Umstead 100 and drank one every hour with electrolytes.

D
David Herman
Solid product

Orange Mud hits it out of the park. You do have to be diligent about keeping them clean.

B
Brittany Leggett
Perfect for electrolyte drinks

This lil guy is perfect for my electrolytes when I run!

J
Joshua Kohn
Dry mouth, no way

The soft flasks resolved our issue of having bulky water bottles that take up space when empty. We could stuff them in a pocket when empty.

R
Ryanthompson
Great product!

Works well, easy to clean.

J
Jean o Lesperance
Soft water bottle.

I have been using the bottle on every run. I love taking occasional small sips. Cheaper than the running store and love the pliability.

J
Joshua Kohn
Staying hydrated has never been easier

Loving our flasks. Easy to pack and easy to use.

t
tom goodbr
Awesome

I've purchased two of these water bottles and they work excellent. I need a lot of water for my long runs so I fill up the hydration pack along with two of these with electrolytes.

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