UltrAspire Ultraflask
Best soft flask for runners and hikers needing reliable hydration.
This hybrid vessel combines the stability of a rigid bottle with the packability of a soft flask. It is the ideal choice for runners who need a bounce-free hydration solution that fits easily into vests or waist packs.
$14.99
Who it's for
- Runners and hikers seeking compact, anti-slosh hydration solutions.
- Athletes prioritizing comfort and seamless integration with hydration vests.
- Active individuals needing quick hydration and easy maintenance.
Who should skip it
- Adventurers requiring extreme durability for harsh, long-term expeditions.
- Sensitive palates who prefer completely neutral-tasting hydration vessels.
- Users needing to keep drinks hot or cold for extended periods.
Performance breakdown
Bounce Control
Engineered to sit flush against the body, virtually eliminating distracting movement.
Flow Rate
High-flow valve delivers rapid hydration without requiring excessive suction effort.
Stowability
Collapses down effortlessly, making it easy to stash in tight pockets.
Ease of Cleaning
Wide-mouth opening simplifies scrubbing and allows for quick ice loading.
Squeezability
Flexible material offers a responsive, effortless squeeze for quick fluid intake.
Build Durability
Robust food-grade LDPE construction handles repeated compression without compromising structural integrity.
Key Specs
Weight
0.10 lbs
Dimensions
3.75 x 2 x 8.25 inches
Capacity
550mL
Material
Food-grade LDPE
BPA Free
Yes
Closure Type
Push/pull valve
Collapsible
Yes
Know before you buy
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Ask Metto anything about the UltrAspire Ultraflask before you decide.
