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Stay hydrated throughout any hike, run or race with the 21oz refillable water bottle that fits perfectly inside the nylon sleeve.
The Ultraflask shrinks as you drink, reducing water sloshing. The super soft material conforms to any pocket
Rinse before use. Dishwasher safe (top rack recommended).
Note that the hose is held in place by a press fit plug on the bottom of the cap. If you want to take it apart to clean, just pull the hose firmly off the cap, being careful not to lose the plug.
Easily access water while out on the trails!
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Ultraflask
Available in both 17oz (500ml) & 20oz (600ml)
The UltraFlask soft flask is an ideal compliment to the Endurance Pack, HydraQuiver Vest Packs, Gear Vest, Adventure Pack and PFV series of Orange Mud products. You can quickly stash the flask in your front chest pocket for access on the fly plus it comes with an optional use 4" hose. Quickly take it off if you just want the bite valve, or if you want the hose leave it as is!
- Soft flask, super soft material conforms to any pocket
- Shrinks as you drink, reducing water sloshing
- Use with or without tube, option to mount bite valve directly to cap
- 42 mm sport cap with silicone bite-valve
- Can be frozen or filled with warm water (max temp 140°F / 60°C)
- Durable, built for a lifetime of tough use, No-Leak
Mary Beth Kierstead
2025-08-20 16:25:12
Thought I was getting two bottles for $19 bucks. I have had terrible luck with the soft bottles leaking but so far this one is great. I just used it for a marathon and it fit well in the front pocket of my UD vest and no need to remove with the long straw. Easy to fill and no leaking!
spinningsports2
2025-07-25 10:50:58
Bottles are compact and fit perfectly in our packs. Used them on a 26 mi marathon and had no issues at all.
Work Bestie
2025-06-07 17:21:10
I prefer this height. I have some skinnier soft flasks that are taller (same volume) and these ride in my vest nicely and don’t bounce out.
Dillon
2025-06-02 14:27:56
Overall a good soft flask. In my Nathan pack, the stems are just a bit short to stay in place and not come loose, but that's not the bottle's fault. Drinking from them with the angled bite top is nice.
Wally
2025-03-09 11:32:42
After using this for several weeks, I love it! It doesn’t leak, kits just about anywhere and is easy to drink from. I also bought the orange mud small hydration back pack and the two go together awesome to plus up on water or have one reserve of water and the other with electrolytes. I plan on ordering another one.
Rev. D. M.
2025-02-28 13:04:16
I use a variety of different flasks for ultrarunning and this is one of my favorites. I use it in an Osprey Duro 6 running vest. No plastic taste and easy to refill at aid stations.
Edgecrusher74
2025-01-29 10:14:25
The tube on the lid makes these easy to use while running out hiking. There is no need to remove them from the vest pockets. They are easy to pack when empty because they take very little space.
Peter Asmus
2025-01-16 16:43:44
I really like the opening for putting in ice, and the fact it’s 600ml
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