HydraPak SkyFlask Speed - Collapsible Handheld Running Water Bottle (350ml, 500ml, 500ml Insulated) - Adjustable Strap, Lightweight, Spill-Proof Cap

Best purchase for running in a long time. I hate bottles while doing long rungs and this one feels so light, but also it does not deforms . I use fit for 18k today and was always Fresh, no leaking!

Light weight, easy to carry! I love using this on my long runs and its easy to get a drink. Does not leak! Perfect for carrying during long runs! Highly reccomend this! Does not have a plastic after taste! 18 oz is just the right amount!

I recently got my hands on the HydraPak SkyFlask Speed - Collapsible Handheld Water Bottle, and it has quickly become an indispensable part of my running and hiking gear. This product is an absolute winner and easily earns a full 5-star rating!What immediately impressed me was its incredibly lightweight and ergonomic design. It fits perfectly in my hand, with an adjustable strap that keeps it secure without feeling bulky or cumbersome. The collapsible nature is genius – as you drink, it shrinks, eliminating sloshing and taking up minimal space when empty. This is a huge advantage over rigid bottles, especially on long runs or when packing light.The bite valve delivers water smoothly and efficiently, making hydration on the go effortless. There's no fumbling or awkward tilting; just a quick squeeze and sip. I've used it on several trail runs and long hikes, and it has performed flawlessly every time. It's also super easy to clean, which is a big plus for maintaining hygiene.The durability of the HydraPak material is also noteworthy. It feels tough and resilient, capable of withstanding the rigors of outdoor adventures without any leaks or concerns.For anyone serious about staying hydrated during their outdoor activities, especially runners, the HydraPak SkyFlask Speed is a game-changer. It's comfortable, practical, durable, and makes carrying water a non-issue. This is an investment that truly enhances your outdoor experience. Highly, highly recommend!

Solid grip for thumb holsters, and easy squeeze drinking mechanism. Though, I've found myself re-inflating the bottle during the run to have a better grip.Easy to clean (soaking in soap water then scrub washing), although I do need a small brush to clean the mouthpiece to ensure there's no grime buildup. I use this bottle with Gatorade/Tailwind/Skratch almost exclusively, so there's always the worry of the sugar collecting and gathering with grime and forming that nasty dark gunk we all hate.Perfectly sized for solid, long workouts, 500 mL sometimes requires refills but is otherwise ample for me.After almost 2 months of use, some wear and tear on the grip handle as I've seen some strings peel out, but that's natural with wear and tear so not too discontent with the build.

I've been using this bottle for a couple weeks now and the bottle definitely works for running. The collapsing feature is nice since it prevents the typical air pocket that causes the water to slosh that happens in hard bottles. It does take a bit of getting used to holding something mushy like this after having used hard bottles for years.Although I think this Skyflask functionally works I think there are two parts of the bottle that could be improved.Although the insulation is a nice feature to keep the liquid at temp for longer, I have a slight issue with how its constructed. There is an approximately 5 mm seam in the plastic shell running the length of the bottle under the hand strap where the insulation is compromised (see picture). If I put in water and ice, I can really feel the coldness in my palm which can become painful like holding anything really cold. I avoid putting ice in my other uninsulated hard bottles for this very reason, so I was hoping that this insulation would take care of that issue. I wish there was no seam or the makers at least put it on the other side where the fingers meet so I'm not touching the cold seam constantly. I assume they put it under the strap for design aesthetics. For this reason I don't put ice cold liquids, which is kind of disappointing.Secondly, I wish the strap had a way to get locked in place. Over the course of a run you want to cinch the strap down to keep a tight grip, but the strap will loosen itself over time. There isn't too much slack to begin with anyways so at its loosest I can still maintain an okay grip so its not too bad, just annoying to use.

This soft flask is extremely light and comfortable to hold. The thumb loop works very well for me. It allows me to hold the bottle securely using almost no grip pressure, with no need to overtighten the velcro hand-strap. The thumb loop is a good size for me and did not cause any chafing or irritation, but it might not work for someone with very large hands. The bite valve has good flow and I didn't experience any leakage. This is a soft flask, so it collapses as you drink from it -- no sloshing. I did not notice any plasticky odor or taste. I can't comment on the effectiveness of the insulation, as all my runs since getting this have been in very cool temps, but I'll update this review after I've had a chance to use it in warmer weather.

Easy to carry but tastes like plastic even after multiple washes.

Bought 2, one for myself and my hubs. Had these for 5 months now. We go on frequent runs outside and these have been absolutely wonderful. They are so easy to strap onto your hand, the size and fit is perfect and they DO not leak. I’ve washed and used these many times and can confirm the taste was only silicon-like the first one or two times. Just soak them and wash and the taste goes away quickly.