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

Vey happy with the practicality of this water bottle. It is a little awkward at first getting used to the straps around your hand but overall it’s very comfortable and I imagine the fit would be suitable for most hand sizes. I also appreciate how well the lid seals and retains water without leaking or anything. And on an even more positive note, it’s very easy to wash and clean. I typically carry this on my medium long runs when it’s warmer outside and it fits my need very well.

It's exactly what it says it is, a silicon water bottle. Great for running, feels secure in the hand with the attached strap, no leaking, easy to clean out. It has a bite spout which is nice for running so you won't shoot an unexpected amount of water down your throat and choke and die. All in all, good product.

I love this water bottle. With the OK heat this summer, running has been rough. I typically don't carry water in cooler temps, but found myself overheating and needing hydration. Tried a Nathan's bottle, and it was hard to squeeze to get water out while running. Also, I had to hold it in my hand. I am not a fan of holding things or having things, like a vest, on my body while I run. This water bottle is easy to hold in your hand though and I really like the collapsing feature, which makes it easier to get water out and to carry the bottle when its not full (no sloshing!). I actually expand the band, throw this over my shoulder, and wear it more like a backpack for the first half of my runs. I'd def recommend it. So far, I’ve used it on road and trail runs about 10 times, and it's still in good shape and working well.

I don't like to carry bottles when I run, but this one is nice. Perfect for shorter distances, collapses as you drink.

This collapsible handheld bottle is a fantastic option for runners or anyone who wants hydration without bulk. The strap is adjustable and comfortable — it stays secure in the hand without needing to grip tightly, which is a huge plus during long runs. The collapsible design works exactly as intended. As you drink, the bottle compresses down, reducing sloshing and making it lighter to carry the farther you go. It also packs away easily in a vest or pocket when empty. The bite valve provides a steady flow of water without leaking, and the wide opening makes it quick to refill at aid stations. It’s easy to clean, and the material feels durable while still remaining flexible. Overall, it’s well-designed, lightweight, and reliable — a must-have hydration tool for distance running or fast-paced workouts where convenience and comfort matter.

This would be a great water bottle if I could ever get the plastic taste to go away. I've tried everything I could find to remedy this but it's still just as strong as the day it arrived.

This product is okay. 3/5 for me. Cons: The black strap doesn't stay fitted very well during a run. I find myself having to tighten the strap frequently, because the flexible-collapsable cup shrinks every sip you take. In other words, I am more worried about the strap being fitted just right rather than enjoying a long run. There is a strange factory-like odor from the cup. Totally understandable, I washed and rinsed it before I used it. But the water did still taste a little funky. This goes away after a few good washes. Pros: Pretty light weight, easy to clean. Really does make a difference to have something to wet your whistle on those longer runs/activities.

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!

Me gustó mucho ! Lo uso para carreras largas de las de 21 km, se adhiere bien al brazo, supero mis expectativas

La uso para correr todos los días y es muy cómoda para distancias largas y cortas. La cinta se ajusta y la capa de espuma que tiene entre el interior y el exterior de la botella, ayuda a mantener el agua al tiempo.

The Hydrapak SkyFlask is a great product for users with specific requirements. I think this product has been designed for runners. It’s compact 350 ml capacity and shape really appealed to me to fit into a very small EDC day pack. I purchased it thinking when it was collapsed it would stay in a neat compressed format like its big brother the Hydrapak Stash. Ie the bottom clips neatly into the top. Unfortunately it does not. It does compress when empty but does not have the same feature to keep it compressed in the neat shape of the Stash. The hand strap does not pull tight enough to keep the compressed bottle in a rolled up shape. The straps function is only to provide additional fitment / security presumably when running with bottle in hand. When empty it does squidge down like an empty toothpaste tube. PROS - Lightweight - Bite valve works well and does not leak even if bottle is squeezed hard - Also clips open for easy fast filling. Clip feels very secure even when bottle is squeezed hard - Cap can be completely unscrewed from the bottle neck allowing replacement or alternative type of cap/straw. - Compresses down and can be stuffed in a pocket or in clothing waste band etc. - Opacity allows your to see liquid level and also good to be able to check there is no mould etc - Build quality feels good. I have not experienced any leaks or punctures etc CONS - Does not stand upright by itself - The bottle interior does initially emit a smell and this transfers as a taste to water etc contained in the bottle. This reduces over time and there are plenty of techniques you can Google to help remove the smell/taste. The smell / taste on a brand new Hydrapak SkyFlask bottle is way too strong and really put me off using it. The big brother Hydrapak Stash does not smell or taste anywhere near as bad.

Avevo già una Hydrapak da 350 ml e ho voluto prendere il modello più capiente, così da avere con me l'acqua durante le gare e assimilare meglio le gelatine energetiche senza fermarmi ai punti di ristoro. La cinghia è comodissima, molto meglio questa semplice di quella con l'anello per il pollice, che ho trovato scomoda perché costringe la mano a fare presa sulla flask. Con questa invece basta tirare la cinghia e la flask rimane aderente al palmo, senza che le dita la stringano. Il materiale è ottimo, non ha odore e non trattiene i sapori. Il prezzo di quasi 30 euro è alto, seppur in linea con il prezzi in rete, ma non mi fido di marchi sconosciuti, che potrebbero usare materiali tossici. Questa isolata è più spessa del modello base, non so quanto isoli davvero, ma mentre corro non mi interessa la temperatura dell'acqua. Il tappo è a tenuta stagna e basta schiacciarlo tra i denti per far uscire il liquido. Trovo più comodo questo modello che quelle più piccole da tenere addosso. Per me promossa a pieni voti.

I tried another hand bottle, but this one is way better because it collapses. Once it is empty, it is easy to refill on the fly or tuck away in a pocket. I use it for marathon training and it works great