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The UltraFlask flask fits easily in most hydration vest, belt or pack pockets
Soft material conforms to any pocket for a comfortable carrying experience
Flexible design shrinks as you drink, reducing water movement on the run
High-flow bite valve auto-seals after each sip, eliminating annoying drips
Includes removable/adjustable drink tube; cut to a custom length or mount bite valve directly to cap
Large 42mm opening lets you fill the UltraFlask easily with ice and drink mixes
Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity
Can be frozen or filled with hot water (max temp 60° C / 140° F)
Top-rack dishwasher safe
Safe and reliable, 100% BPA & PVC free
We only ship this brand to US Addresses.
Rated 5 out of
Works Great!The straw is perfect for drinking from. Easier than bottles without straws. Bite valve works as expected. I use these for longish (4+ hour) run/hikes.
Date published: 2018-04-24
Rated 4 out of
soft flaskI bought this bottle because I wear a pack that carries water bottles in the front and I was getting tired of listening to sloshing water. This bottle seems to be made of quality materials and it works very well. I don't really like bite valves but this one is very easy to use. I've been using hard sided 20 oz bottles and so I bought the roughly 20 oz size but found that that size filled fully results in the top of the bottle flopping back and forth because it sticks up past the edge of the pocket. I can't run with it like that so I have had to fill the bottles only partially so I could stuff the cap down into the pocket. They do have smaller sizes and a pack designed differently could work well with a full bottle.